What rigorous mathematical theorems has Edward Witten discovered?What is mathematical equation of the Gravitational force between three objects?In what ways has physics spurred the invention of new mathematical tools?Guidance regarding research in Mathematical PhysicsWhat is a good reference for rigorous Electromagnetism and Electrodynamics?What is the mathematical understanding behind what physicists call a gauge fixing?A space more fundamental than Euclidean spaceA text that can accompany this Course on “Geometry for theoretical physics”What are the mathematical foundations of the renormalisation group?Was von Neumann's 1954 ICM address “Unsolved Problems in Mathematics” outdated?Intuitionism and theoretical physics

Is there a data structure that only stores hash codes and not the actual objects?

It's a yearly task, alright

Examples of the Pigeonhole Principle

Does Mathematica reuse previous computations?

Interplanetary conflict, some disease destroys the ability to understand or appreciate music

Time travel from stationary position?

The difference between「N分で」and「後N分で」

Brexit - No Deal Rejection

Why does Bach not break the rules here?

How to terminate ping <dest> &

What approach do we need to follow for projects without a test environment?

Are ETF trackers fundamentally better than individual stocks?

Identifying the interval from A♭ to D♯

A Cautionary Suggestion

Why doesn't the EU now just force the UK to choose between referendum and no-deal?

How to explain that I do not want to visit a country due to personal safety concern?

My adviser wants to be the first author

Does someone need to be connected to my network to sniff HTTP requests?

Opacity of an object in 2.8

How Could an Airship Be Repaired Mid-Flight

What are substitutions for coconut in curry?

Co-worker team leader wants to inject his friend's awful software into our development. What should I say to our common boss?

Existence of subset with given Hausdorff dimension

What is the significance behind "40 days" that often appears in the Bible?



What rigorous mathematical theorems has Edward Witten discovered?


What is mathematical equation of the Gravitational force between three objects?In what ways has physics spurred the invention of new mathematical tools?Guidance regarding research in Mathematical PhysicsWhat is a good reference for rigorous Electromagnetism and Electrodynamics?What is the mathematical understanding behind what physicists call a gauge fixing?A space more fundamental than Euclidean spaceA text that can accompany this Course on “Geometry for theoretical physics”What are the mathematical foundations of the renormalisation group?Was von Neumann's 1954 ICM address “Unsolved Problems in Mathematics” outdated?Intuitionism and theoretical physics













4












$begingroup$


I read that Ed Witten's 1990 Fields Medal was somewhat controversial among mathematicians, because even though no one questioned his deep conceptual understanding of important new mathematical ideas, his work was not considered rigorous enough to deserve the medal. For example, Wikipedia claims that




Witten's work [on Chern-Simons theory and topological quantum field theory] was based on the mathematically ill-defined notion of a Feynman path integral and was therefore not mathematically rigorous, [although] mathematicians were [later] able to systematically develop Witten's ideas.




Moreover, the actual discovery that his Fields Medal nominally awarded was an innovative new simpler proof of the positive energy theorem, which had already been proven.



What are some examples of theorems that Witten discovered that were not previously known, such that there is consensus across the mathematical community that (a) the hypothesis and conclusion of the theorem are completely and unambiguously mathematically well-posed and (b) the proof is completely mathematically rigorous?



Edit: I don't mean theorems that Witten proposed non-rigorously which were then later made rigorous by mathematicians (of which there are many). I mean theorems for which Witten himself provided the rigorous version. (I know there are eternal philosophical debates between mathematicians about the relative importance of imprecise conjectures vs. precise conjectures vs. rigorous proofs for statements that end up being correct. But presumably both correctness and proof are important for the kind of work that the Fields Medal's purpose is to recognize.)










share|cite|improve this question











$endgroup$











  • $begingroup$
    @MichaelHardy Style guides discourage using en dashes (used for sentence breaks or number ranges) rather than hyphens to join proper names together, so I rolled back your edit.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:03










  • $begingroup$
    Which style guides? Wikipedia's manual of style requires that usage. So does the Pacific Journal of Mathematics.
    $endgroup$
    – Michael Hardy
    Jun 2 '18 at 2:43










  • $begingroup$
    @MichaelHardy The Chicago Manual of Style specifies that a hyphen should be used in the phrase "Michelson-Morley experiment", which is remarkably parallel to "Chern-Simons theory". Most online sources that I found recommend limiting en dashes to numerical ranges and a few more obscure cases; Wikipedia's style guidlines seem to be represent a small minority position.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:44











  • $begingroup$
    @MichaelHardy But I don't feel strongly about it - if you want to roll back to v2 then I won't reroll back to v1.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:46
















4












$begingroup$


I read that Ed Witten's 1990 Fields Medal was somewhat controversial among mathematicians, because even though no one questioned his deep conceptual understanding of important new mathematical ideas, his work was not considered rigorous enough to deserve the medal. For example, Wikipedia claims that




Witten's work [on Chern-Simons theory and topological quantum field theory] was based on the mathematically ill-defined notion of a Feynman path integral and was therefore not mathematically rigorous, [although] mathematicians were [later] able to systematically develop Witten's ideas.




Moreover, the actual discovery that his Fields Medal nominally awarded was an innovative new simpler proof of the positive energy theorem, which had already been proven.



What are some examples of theorems that Witten discovered that were not previously known, such that there is consensus across the mathematical community that (a) the hypothesis and conclusion of the theorem are completely and unambiguously mathematically well-posed and (b) the proof is completely mathematically rigorous?



Edit: I don't mean theorems that Witten proposed non-rigorously which were then later made rigorous by mathematicians (of which there are many). I mean theorems for which Witten himself provided the rigorous version. (I know there are eternal philosophical debates between mathematicians about the relative importance of imprecise conjectures vs. precise conjectures vs. rigorous proofs for statements that end up being correct. But presumably both correctness and proof are important for the kind of work that the Fields Medal's purpose is to recognize.)










share|cite|improve this question











$endgroup$











  • $begingroup$
    @MichaelHardy Style guides discourage using en dashes (used for sentence breaks or number ranges) rather than hyphens to join proper names together, so I rolled back your edit.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:03










  • $begingroup$
    Which style guides? Wikipedia's manual of style requires that usage. So does the Pacific Journal of Mathematics.
    $endgroup$
    – Michael Hardy
    Jun 2 '18 at 2:43










  • $begingroup$
    @MichaelHardy The Chicago Manual of Style specifies that a hyphen should be used in the phrase "Michelson-Morley experiment", which is remarkably parallel to "Chern-Simons theory". Most online sources that I found recommend limiting en dashes to numerical ranges and a few more obscure cases; Wikipedia's style guidlines seem to be represent a small minority position.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:44











  • $begingroup$
    @MichaelHardy But I don't feel strongly about it - if you want to roll back to v2 then I won't reroll back to v1.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:46














4












4








4


2



$begingroup$


I read that Ed Witten's 1990 Fields Medal was somewhat controversial among mathematicians, because even though no one questioned his deep conceptual understanding of important new mathematical ideas, his work was not considered rigorous enough to deserve the medal. For example, Wikipedia claims that




Witten's work [on Chern-Simons theory and topological quantum field theory] was based on the mathematically ill-defined notion of a Feynman path integral and was therefore not mathematically rigorous, [although] mathematicians were [later] able to systematically develop Witten's ideas.




Moreover, the actual discovery that his Fields Medal nominally awarded was an innovative new simpler proof of the positive energy theorem, which had already been proven.



What are some examples of theorems that Witten discovered that were not previously known, such that there is consensus across the mathematical community that (a) the hypothesis and conclusion of the theorem are completely and unambiguously mathematically well-posed and (b) the proof is completely mathematically rigorous?



Edit: I don't mean theorems that Witten proposed non-rigorously which were then later made rigorous by mathematicians (of which there are many). I mean theorems for which Witten himself provided the rigorous version. (I know there are eternal philosophical debates between mathematicians about the relative importance of imprecise conjectures vs. precise conjectures vs. rigorous proofs for statements that end up being correct. But presumably both correctness and proof are important for the kind of work that the Fields Medal's purpose is to recognize.)










share|cite|improve this question











$endgroup$




I read that Ed Witten's 1990 Fields Medal was somewhat controversial among mathematicians, because even though no one questioned his deep conceptual understanding of important new mathematical ideas, his work was not considered rigorous enough to deserve the medal. For example, Wikipedia claims that




Witten's work [on Chern-Simons theory and topological quantum field theory] was based on the mathematically ill-defined notion of a Feynman path integral and was therefore not mathematically rigorous, [although] mathematicians were [later] able to systematically develop Witten's ideas.




Moreover, the actual discovery that his Fields Medal nominally awarded was an innovative new simpler proof of the positive energy theorem, which had already been proven.



What are some examples of theorems that Witten discovered that were not previously known, such that there is consensus across the mathematical community that (a) the hypothesis and conclusion of the theorem are completely and unambiguously mathematically well-posed and (b) the proof is completely mathematically rigorous?



Edit: I don't mean theorems that Witten proposed non-rigorously which were then later made rigorous by mathematicians (of which there are many). I mean theorems for which Witten himself provided the rigorous version. (I know there are eternal philosophical debates between mathematicians about the relative importance of imprecise conjectures vs. precise conjectures vs. rigorous proofs for statements that end up being correct. But presumably both correctness and proof are important for the kind of work that the Fields Medal's purpose is to recognize.)







mathematical-physics quantum-field-theory gauge-theory topological-quantum-field-theory






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Mar 11 at 19:48









Andrews

1,2691421




1,2691421










asked Jun 1 '18 at 18:39









tparkertparker

1,926834




1,926834











  • $begingroup$
    @MichaelHardy Style guides discourage using en dashes (used for sentence breaks or number ranges) rather than hyphens to join proper names together, so I rolled back your edit.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:03










  • $begingroup$
    Which style guides? Wikipedia's manual of style requires that usage. So does the Pacific Journal of Mathematics.
    $endgroup$
    – Michael Hardy
    Jun 2 '18 at 2:43










  • $begingroup$
    @MichaelHardy The Chicago Manual of Style specifies that a hyphen should be used in the phrase "Michelson-Morley experiment", which is remarkably parallel to "Chern-Simons theory". Most online sources that I found recommend limiting en dashes to numerical ranges and a few more obscure cases; Wikipedia's style guidlines seem to be represent a small minority position.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:44











  • $begingroup$
    @MichaelHardy But I don't feel strongly about it - if you want to roll back to v2 then I won't reroll back to v1.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:46

















  • $begingroup$
    @MichaelHardy Style guides discourage using en dashes (used for sentence breaks or number ranges) rather than hyphens to join proper names together, so I rolled back your edit.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:03










  • $begingroup$
    Which style guides? Wikipedia's manual of style requires that usage. So does the Pacific Journal of Mathematics.
    $endgroup$
    – Michael Hardy
    Jun 2 '18 at 2:43










  • $begingroup$
    @MichaelHardy The Chicago Manual of Style specifies that a hyphen should be used in the phrase "Michelson-Morley experiment", which is remarkably parallel to "Chern-Simons theory". Most online sources that I found recommend limiting en dashes to numerical ranges and a few more obscure cases; Wikipedia's style guidlines seem to be represent a small minority position.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:44











  • $begingroup$
    @MichaelHardy But I don't feel strongly about it - if you want to roll back to v2 then I won't reroll back to v1.
    $endgroup$
    – tparker
    Jun 2 '18 at 3:46
















$begingroup$
@MichaelHardy Style guides discourage using en dashes (used for sentence breaks or number ranges) rather than hyphens to join proper names together, so I rolled back your edit.
$endgroup$
– tparker
Jun 1 '18 at 23:03




$begingroup$
@MichaelHardy Style guides discourage using en dashes (used for sentence breaks or number ranges) rather than hyphens to join proper names together, so I rolled back your edit.
$endgroup$
– tparker
Jun 1 '18 at 23:03












$begingroup$
Which style guides? Wikipedia's manual of style requires that usage. So does the Pacific Journal of Mathematics.
$endgroup$
– Michael Hardy
Jun 2 '18 at 2:43




$begingroup$
Which style guides? Wikipedia's manual of style requires that usage. So does the Pacific Journal of Mathematics.
$endgroup$
– Michael Hardy
Jun 2 '18 at 2:43












$begingroup$
@MichaelHardy The Chicago Manual of Style specifies that a hyphen should be used in the phrase "Michelson-Morley experiment", which is remarkably parallel to "Chern-Simons theory". Most online sources that I found recommend limiting en dashes to numerical ranges and a few more obscure cases; Wikipedia's style guidlines seem to be represent a small minority position.
$endgroup$
– tparker
Jun 2 '18 at 3:44





$begingroup$
@MichaelHardy The Chicago Manual of Style specifies that a hyphen should be used in the phrase "Michelson-Morley experiment", which is remarkably parallel to "Chern-Simons theory". Most online sources that I found recommend limiting en dashes to numerical ranges and a few more obscure cases; Wikipedia's style guidlines seem to be represent a small minority position.
$endgroup$
– tparker
Jun 2 '18 at 3:44













$begingroup$
@MichaelHardy But I don't feel strongly about it - if you want to roll back to v2 then I won't reroll back to v1.
$endgroup$
– tparker
Jun 2 '18 at 3:46





$begingroup$
@MichaelHardy But I don't feel strongly about it - if you want to roll back to v2 then I won't reroll back to v1.
$endgroup$
– tparker
Jun 2 '18 at 3:46











1 Answer
1






active

oldest

votes


















7












$begingroup$

Let a famous mathematician answer this question on the contributions of Edward Witten: On the work of Edward Witten, by Michael Atiyah.






share|cite|improve this answer









$endgroup$








  • 1




    $begingroup$
    I don't think this really addresses my question because it doesn't specify the mathematical rigor of Witten's various results, which is the main point of my question. The article uses the word "rigorous" six times. Three of the uses specifically refer to (other) mathematicians' later formalizations of Witten's rough ideas. The other three are more ambiguous (e.g. "rigorous proofs ... have always been forthcoming"), but as far as I can tell do as well.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:16






  • 1




    $begingroup$
    I think, Atiyah clearly discusses and answers the question about the mathematical rigour. This is a main point to justify for awarding the Fields Medal in Mathematics.
    $endgroup$
    – Dietrich Burde
    Jun 2 '18 at 8:11










Your Answer





StackExchange.ifUsing("editor", function ()
return StackExchange.using("mathjaxEditing", function ()
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
);
);
, "mathjax-editing");

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "69"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);













draft saved

draft discarded


















StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f2804666%2fwhat-rigorous-mathematical-theorems-has-edward-witten-discovered%23new-answer', 'question_page');

);

Post as a guest















Required, but never shown

























1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









7












$begingroup$

Let a famous mathematician answer this question on the contributions of Edward Witten: On the work of Edward Witten, by Michael Atiyah.






share|cite|improve this answer









$endgroup$








  • 1




    $begingroup$
    I don't think this really addresses my question because it doesn't specify the mathematical rigor of Witten's various results, which is the main point of my question. The article uses the word "rigorous" six times. Three of the uses specifically refer to (other) mathematicians' later formalizations of Witten's rough ideas. The other three are more ambiguous (e.g. "rigorous proofs ... have always been forthcoming"), but as far as I can tell do as well.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:16






  • 1




    $begingroup$
    I think, Atiyah clearly discusses and answers the question about the mathematical rigour. This is a main point to justify for awarding the Fields Medal in Mathematics.
    $endgroup$
    – Dietrich Burde
    Jun 2 '18 at 8:11















7












$begingroup$

Let a famous mathematician answer this question on the contributions of Edward Witten: On the work of Edward Witten, by Michael Atiyah.






share|cite|improve this answer









$endgroup$








  • 1




    $begingroup$
    I don't think this really addresses my question because it doesn't specify the mathematical rigor of Witten's various results, which is the main point of my question. The article uses the word "rigorous" six times. Three of the uses specifically refer to (other) mathematicians' later formalizations of Witten's rough ideas. The other three are more ambiguous (e.g. "rigorous proofs ... have always been forthcoming"), but as far as I can tell do as well.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:16






  • 1




    $begingroup$
    I think, Atiyah clearly discusses and answers the question about the mathematical rigour. This is a main point to justify for awarding the Fields Medal in Mathematics.
    $endgroup$
    – Dietrich Burde
    Jun 2 '18 at 8:11













7












7








7





$begingroup$

Let a famous mathematician answer this question on the contributions of Edward Witten: On the work of Edward Witten, by Michael Atiyah.






share|cite|improve this answer









$endgroup$



Let a famous mathematician answer this question on the contributions of Edward Witten: On the work of Edward Witten, by Michael Atiyah.







share|cite|improve this answer












share|cite|improve this answer



share|cite|improve this answer










answered Jun 1 '18 at 18:45









Dietrich BurdeDietrich Burde

80.7k647104




80.7k647104







  • 1




    $begingroup$
    I don't think this really addresses my question because it doesn't specify the mathematical rigor of Witten's various results, which is the main point of my question. The article uses the word "rigorous" six times. Three of the uses specifically refer to (other) mathematicians' later formalizations of Witten's rough ideas. The other three are more ambiguous (e.g. "rigorous proofs ... have always been forthcoming"), but as far as I can tell do as well.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:16






  • 1




    $begingroup$
    I think, Atiyah clearly discusses and answers the question about the mathematical rigour. This is a main point to justify for awarding the Fields Medal in Mathematics.
    $endgroup$
    – Dietrich Burde
    Jun 2 '18 at 8:11












  • 1




    $begingroup$
    I don't think this really addresses my question because it doesn't specify the mathematical rigor of Witten's various results, which is the main point of my question. The article uses the word "rigorous" six times. Three of the uses specifically refer to (other) mathematicians' later formalizations of Witten's rough ideas. The other three are more ambiguous (e.g. "rigorous proofs ... have always been forthcoming"), but as far as I can tell do as well.
    $endgroup$
    – tparker
    Jun 1 '18 at 23:16






  • 1




    $begingroup$
    I think, Atiyah clearly discusses and answers the question about the mathematical rigour. This is a main point to justify for awarding the Fields Medal in Mathematics.
    $endgroup$
    – Dietrich Burde
    Jun 2 '18 at 8:11







1




1




$begingroup$
I don't think this really addresses my question because it doesn't specify the mathematical rigor of Witten's various results, which is the main point of my question. The article uses the word "rigorous" six times. Three of the uses specifically refer to (other) mathematicians' later formalizations of Witten's rough ideas. The other three are more ambiguous (e.g. "rigorous proofs ... have always been forthcoming"), but as far as I can tell do as well.
$endgroup$
– tparker
Jun 1 '18 at 23:16




$begingroup$
I don't think this really addresses my question because it doesn't specify the mathematical rigor of Witten's various results, which is the main point of my question. The article uses the word "rigorous" six times. Three of the uses specifically refer to (other) mathematicians' later formalizations of Witten's rough ideas. The other three are more ambiguous (e.g. "rigorous proofs ... have always been forthcoming"), but as far as I can tell do as well.
$endgroup$
– tparker
Jun 1 '18 at 23:16




1




1




$begingroup$
I think, Atiyah clearly discusses and answers the question about the mathematical rigour. This is a main point to justify for awarding the Fields Medal in Mathematics.
$endgroup$
– Dietrich Burde
Jun 2 '18 at 8:11




$begingroup$
I think, Atiyah clearly discusses and answers the question about the mathematical rigour. This is a main point to justify for awarding the Fields Medal in Mathematics.
$endgroup$
– Dietrich Burde
Jun 2 '18 at 8:11

















draft saved

draft discarded
















































Thanks for contributing an answer to Mathematics Stack Exchange!


  • Please be sure to answer the question. Provide details and share your research!

But avoid


  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.

Use MathJax to format equations. MathJax reference.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f2804666%2fwhat-rigorous-mathematical-theorems-has-edward-witten-discovered%23new-answer', 'question_page');

);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Lowndes Grove History Architecture References Navigation menu32°48′6″N 79°57′58″W / 32.80167°N 79.96611°W / 32.80167; -79.9661132°48′6″N 79°57′58″W / 32.80167°N 79.96611°W / 32.80167; -79.9661178002500"National Register Information System"Historic houses of South Carolina"Lowndes Grove""+32° 48' 6.00", −79° 57' 58.00""Lowndes Grove, Charleston County (260 St. Margaret St., Charleston)""Lowndes Grove"The Charleston ExpositionIt Happened in South Carolina"Lowndes Grove (House), Saint Margaret Street & Sixth Avenue, Charleston, Charleston County, SC(Photographs)"Plantations of the Carolina Low Countrye

random experiment with two different functions on unit interval Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)Random variable and probability space notionsRandom Walk with EdgesFinding functions where the increase over a random interval is Poisson distributedNumber of days until dayCan an observed event in fact be of zero probability?Unit random processmodels of coins and uniform distributionHow to get the number of successes given $n$ trials , probability $P$ and a random variable $X$Absorbing Markov chain in a computer. Is “almost every” turned into always convergence in computer executions?Stopped random walk is not uniformly integrable

How should I support this large drywall patch? Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern) Announcing the arrival of Valued Associate #679: Cesar Manara Unicorn Meta Zoo #1: Why another podcast?How do I cover large gaps in drywall?How do I keep drywall around a patch from crumbling?Can I glue a second layer of drywall?How to patch long strip on drywall?Large drywall patch: how to avoid bulging seams?Drywall Mesh Patch vs. Bulge? To remove or not to remove?How to fix this drywall job?Prep drywall before backsplashWhat's the best way to fix this horrible drywall patch job?Drywall patching using 3M Patch Plus Primer