Modern Geometry: Projectivity Problem Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)ancient concepts and modern conceptsIncident geometry?Two dimensions geometry problemA GRE Geometry QuestionComputational Geometry AlgorithmLattice Point GeometryProof about a projectivity of $mathbbP^2$ and four lines of that projective spaceHow many pairwise distances are required to fix a rigid graph?A line through fixed points, in $mathbbP^2$ , is a fixed line or an invariant one?Fix points and invariant planes of projectivity rotating three vertices of tetrahedron

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Modern Geometry: Projectivity Problem



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)ancient concepts and modern conceptsIncident geometry?Two dimensions geometry problemA GRE Geometry QuestionComputational Geometry AlgorithmLattice Point GeometryProof about a projectivity of $mathbbP^2$ and four lines of that projective spaceHow many pairwise distances are required to fix a rigid graph?A line through fixed points, in $mathbbP^2$ , is a fixed line or an invariant one?Fix points and invariant planes of projectivity rotating three vertices of tetrahedron










0












$begingroup$


for a projectivity in which the points of a line are projected back into points on the same line, what is the minimum number of points that must be invariant before you know that all the points are invarant










share|cite|improve this question









$endgroup$











  • $begingroup$
    Any thoughts of your own on this?
    $endgroup$
    – amd
    Mar 27 at 18:42















0












$begingroup$


for a projectivity in which the points of a line are projected back into points on the same line, what is the minimum number of points that must be invariant before you know that all the points are invarant










share|cite|improve this question









$endgroup$











  • $begingroup$
    Any thoughts of your own on this?
    $endgroup$
    – amd
    Mar 27 at 18:42













0












0








0





$begingroup$


for a projectivity in which the points of a line are projected back into points on the same line, what is the minimum number of points that must be invariant before you know that all the points are invarant










share|cite|improve this question









$endgroup$




for a projectivity in which the points of a line are projected back into points on the same line, what is the minimum number of points that must be invariant before you know that all the points are invarant







geometry






share|cite|improve this question













share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Mar 27 at 16:37









Maths2020Maths2020

435




435











  • $begingroup$
    Any thoughts of your own on this?
    $endgroup$
    – amd
    Mar 27 at 18:42
















  • $begingroup$
    Any thoughts of your own on this?
    $endgroup$
    – amd
    Mar 27 at 18:42















$begingroup$
Any thoughts of your own on this?
$endgroup$
– amd
Mar 27 at 18:42




$begingroup$
Any thoughts of your own on this?
$endgroup$
– amd
Mar 27 at 18:42










0






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