$C^1$ Lipschitz function linear growth Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)Approximate continous function with linear growth condition by Lipschitz functionWhy is this function not locally Lipschitz?Classify the growth of functions and find a more general growth functionLipschitz/Hölder continuity of cosine functionLinear functions $mathbbC^nlongrightarrowmathbbC^m$ are Lipschitz continousLipschitz Continuity For a Vector Function.Some questions about function's growth.Linear function: relation between linearity and continuityDifferentiable Manifolds, Metric Space Structure, Lipschitz ContinuityDifference between “Rate of growth of a function” and “Order of growth of a function”

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$C^1$ Lipschitz function linear growth



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)Approximate continous function with linear growth condition by Lipschitz functionWhy is this function not locally Lipschitz?Classify the growth of functions and find a more general growth functionLipschitz/Hölder continuity of cosine functionLinear functions $mathbbC^nlongrightarrowmathbbC^m$ are Lipschitz continousLipschitz Continuity For a Vector Function.Some questions about function's growth.Linear function: relation between linearity and continuityDifferentiable Manifolds, Metric Space Structure, Lipschitz ContinuityDifference between “Rate of growth of a function” and “Order of growth of a function”










1












$begingroup$


I would like to know how to prove that a $C^1$ Lipschitz function has linear growth. (Actually I don't even know if it is true, it is a question in my exam – it says prove that, so it means it is true).



Thanks in advance.










share|cite|improve this question











$endgroup$











  • $begingroup$
    By "linear growth" do you mean that $tfracf(x)$ is bounded for $|x|>1$?
    $endgroup$
    – amsmath
    Mar 27 at 20:40











  • $begingroup$
    yes, more precisely |f(x)|<=k(1+|x|)
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:45















1












$begingroup$


I would like to know how to prove that a $C^1$ Lipschitz function has linear growth. (Actually I don't even know if it is true, it is a question in my exam – it says prove that, so it means it is true).



Thanks in advance.










share|cite|improve this question











$endgroup$











  • $begingroup$
    By "linear growth" do you mean that $tfracf(x)$ is bounded for $|x|>1$?
    $endgroup$
    – amsmath
    Mar 27 at 20:40











  • $begingroup$
    yes, more precisely |f(x)|<=k(1+|x|)
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:45













1












1








1


1



$begingroup$


I would like to know how to prove that a $C^1$ Lipschitz function has linear growth. (Actually I don't even know if it is true, it is a question in my exam – it says prove that, so it means it is true).



Thanks in advance.










share|cite|improve this question











$endgroup$




I would like to know how to prove that a $C^1$ Lipschitz function has linear growth. (Actually I don't even know if it is true, it is a question in my exam – it says prove that, so it means it is true).



Thanks in advance.







analysis






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Mar 27 at 19:42









Bernard

124k742117




124k742117










asked Mar 27 at 19:40









Minkowski YaacovMinkowski Yaacov

113




113











  • $begingroup$
    By "linear growth" do you mean that $tfracf(x)$ is bounded for $|x|>1$?
    $endgroup$
    – amsmath
    Mar 27 at 20:40











  • $begingroup$
    yes, more precisely |f(x)|<=k(1+|x|)
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:45
















  • $begingroup$
    By "linear growth" do you mean that $tfracf(x)$ is bounded for $|x|>1$?
    $endgroup$
    – amsmath
    Mar 27 at 20:40











  • $begingroup$
    yes, more precisely |f(x)|<=k(1+|x|)
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:45















$begingroup$
By "linear growth" do you mean that $tfracf(x)$ is bounded for $|x|>1$?
$endgroup$
– amsmath
Mar 27 at 20:40





$begingroup$
By "linear growth" do you mean that $tfracf(x)$ is bounded for $|x|>1$?
$endgroup$
– amsmath
Mar 27 at 20:40













$begingroup$
yes, more precisely |f(x)|<=k(1+|x|)
$endgroup$
– Minkowski Yaacov
Mar 27 at 20:45




$begingroup$
yes, more precisely |f(x)|<=k(1+|x|)
$endgroup$
– Minkowski Yaacov
Mar 27 at 20:45










1 Answer
1






active

oldest

votes


















1












$begingroup$

No need for $C^1$:
$$fracf(x)1+lefracf(x)-f(0)1+lefrac) + 1+le L+|f(0)|.$$






share|cite|improve this answer









$endgroup$












  • $begingroup$
    thanks but i just realize that i wanted to proof the opposite: that a function with linear growth is C^1 and Lipschitz. I'm sorry, my bad.
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:51







  • 1




    $begingroup$
    Then ask a new question, upvote and check my answer.
    $endgroup$
    – amsmath
    Mar 27 at 20:54










  • $begingroup$
    But I can answer that question right away: no. For a very simple reason: $|f(x)|le k(1+|x|)$ just means that the graph of $f$ is contained in some sector. But it can be anything there. Even completely non-continuous.
    $endgroup$
    – amsmath
    Mar 27 at 20:59











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









1












$begingroup$

No need for $C^1$:
$$fracf(x)1+lefracf(x)-f(0)1+lefrac) + 1+le L+|f(0)|.$$






share|cite|improve this answer









$endgroup$












  • $begingroup$
    thanks but i just realize that i wanted to proof the opposite: that a function with linear growth is C^1 and Lipschitz. I'm sorry, my bad.
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:51







  • 1




    $begingroup$
    Then ask a new question, upvote and check my answer.
    $endgroup$
    – amsmath
    Mar 27 at 20:54










  • $begingroup$
    But I can answer that question right away: no. For a very simple reason: $|f(x)|le k(1+|x|)$ just means that the graph of $f$ is contained in some sector. But it can be anything there. Even completely non-continuous.
    $endgroup$
    – amsmath
    Mar 27 at 20:59















1












$begingroup$

No need for $C^1$:
$$fracf(x)1+lefracf(x)-f(0)1+lefrac) + 1+le L+|f(0)|.$$






share|cite|improve this answer









$endgroup$












  • $begingroup$
    thanks but i just realize that i wanted to proof the opposite: that a function with linear growth is C^1 and Lipschitz. I'm sorry, my bad.
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:51







  • 1




    $begingroup$
    Then ask a new question, upvote and check my answer.
    $endgroup$
    – amsmath
    Mar 27 at 20:54










  • $begingroup$
    But I can answer that question right away: no. For a very simple reason: $|f(x)|le k(1+|x|)$ just means that the graph of $f$ is contained in some sector. But it can be anything there. Even completely non-continuous.
    $endgroup$
    – amsmath
    Mar 27 at 20:59













1












1








1





$begingroup$

No need for $C^1$:
$$fracf(x)1+lefracf(x)-f(0)1+lefrac) + 1+le L+|f(0)|.$$






share|cite|improve this answer









$endgroup$



No need for $C^1$:
$$fracf(x)1+lefracf(x)-f(0)1+lefrac) + 1+le L+|f(0)|.$$







share|cite|improve this answer












share|cite|improve this answer



share|cite|improve this answer










answered Mar 27 at 20:47









amsmathamsmath

3,441421




3,441421











  • $begingroup$
    thanks but i just realize that i wanted to proof the opposite: that a function with linear growth is C^1 and Lipschitz. I'm sorry, my bad.
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:51







  • 1




    $begingroup$
    Then ask a new question, upvote and check my answer.
    $endgroup$
    – amsmath
    Mar 27 at 20:54










  • $begingroup$
    But I can answer that question right away: no. For a very simple reason: $|f(x)|le k(1+|x|)$ just means that the graph of $f$ is contained in some sector. But it can be anything there. Even completely non-continuous.
    $endgroup$
    – amsmath
    Mar 27 at 20:59
















  • $begingroup$
    thanks but i just realize that i wanted to proof the opposite: that a function with linear growth is C^1 and Lipschitz. I'm sorry, my bad.
    $endgroup$
    – Minkowski Yaacov
    Mar 27 at 20:51







  • 1




    $begingroup$
    Then ask a new question, upvote and check my answer.
    $endgroup$
    – amsmath
    Mar 27 at 20:54










  • $begingroup$
    But I can answer that question right away: no. For a very simple reason: $|f(x)|le k(1+|x|)$ just means that the graph of $f$ is contained in some sector. But it can be anything there. Even completely non-continuous.
    $endgroup$
    – amsmath
    Mar 27 at 20:59















$begingroup$
thanks but i just realize that i wanted to proof the opposite: that a function with linear growth is C^1 and Lipschitz. I'm sorry, my bad.
$endgroup$
– Minkowski Yaacov
Mar 27 at 20:51





$begingroup$
thanks but i just realize that i wanted to proof the opposite: that a function with linear growth is C^1 and Lipschitz. I'm sorry, my bad.
$endgroup$
– Minkowski Yaacov
Mar 27 at 20:51





1




1




$begingroup$
Then ask a new question, upvote and check my answer.
$endgroup$
– amsmath
Mar 27 at 20:54




$begingroup$
Then ask a new question, upvote and check my answer.
$endgroup$
– amsmath
Mar 27 at 20:54












$begingroup$
But I can answer that question right away: no. For a very simple reason: $|f(x)|le k(1+|x|)$ just means that the graph of $f$ is contained in some sector. But it can be anything there. Even completely non-continuous.
$endgroup$
– amsmath
Mar 27 at 20:59




$begingroup$
But I can answer that question right away: no. For a very simple reason: $|f(x)|le k(1+|x|)$ just means that the graph of $f$ is contained in some sector. But it can be anything there. Even completely non-continuous.
$endgroup$
– amsmath
Mar 27 at 20:59

















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