Search results
Jump to navigation
Jump to search
- ...is a theorem used in studying [[intrinsic metric|intrinsic geometry]] of [[convex surface]]. ...gamma</math> is a unit-speed minimizing [[geodesic]] on the surface of a [[convex body]] ''K'' in [[Euclidean space]] then for any point ''p'' ∈&nb ...717 bytes (74 words) - 23:41, 28 July 2019
- {{Short description|Upper bound on the volume of a convex body containing one lattice point}} ...soon as its volume exceeds <math>2^n</math>. The conjecture states that a convex body ''K'' containing only one lattice point in its interior as its [[Cente ...2 KB (330 words) - 04:26, 12 January 2025
- ...}, [https://books.google.com/books?id=ofrBsl61lq8C&pg=PA67&dq=%22unbounded+convex+polyhedron%22&sig=ACfU3U1Yv3iG-XIn3hiuh84nK2e8UIcdAA#PPA68,M1 p. 68]</ref> ...rives from the fact that the set of all conical sum of vectors defines a [[Convex cone|cone]] (possibly in a lower-dimensional [[Linear subspace|subspace]]). ...3 KB (547 words) - 06:49, 7 January 2024
- ...e=3 April 2023}}</ref><ref>{{cite arXiv |last1=Fritz |first1=Tobias |title=Convex Spaces I: Definition and Examples |year=2009 |class=math.MG |eprint=0903.55 A convex space can be defined as a set <math>X</math> equipped with a binary convex combination operation <math>c_\lambda : X \times X \rightarrow X</math> for ...2 KB (348 words) - 17:19, 2 February 2024
- ...s a kind of a [[convex cone]] that is particularly important in modeling [[convex optimization]] problems.<ref name=":0">{{Cite web |title=MOSEK Modeling Coo ...]] programs. There are many problems that can be described as minimizing a convex function over a power cone.<ref name=":0" /> ...2 KB (219 words) - 18:33, 9 October 2024
- ...vex set that are not exposed points. Therefore, not every convex face of a convex set is an exposed face.]] In [[mathematics]], most commonly in [[convex geometry]], an '''extreme set''' or '''face''' of a set <math>C\subseteq V</math> in ...3 KB (562 words) - 20:54, 22 February 2025
- ...is the [[discrete geometry]] analogue of the concept of [[convex set]] in geometry. ...if any point ''y'' in the [[convex hull]] of ''X'' can be expressed as a [[convex combination]] of the points of ''X'' that are "near" ''y'', where "near" me ...4 KB (578 words) - 18:48, 10 January 2024
- ...osition if they are pairwise disjoint and none of them is contained in the convex hull of the others.{{r|tv05}} ...t solvable in [[polynomial time]] by [[dynamic programming]] for points in convex position.{{r|k80}} ...5 KB (661 words) - 11:14, 18 December 2023
- ...le:Convex polygon trivial triangulation.svg|thumb|Fan triangulation of a [[convex polygon]]]] ...on can be triangulated this way, so this method is usually only used for [[convex polygon]]s.<ref name=Loera2010>{{cite book |last1=Loera |first1=Jesus |last ...3 KB (410 words) - 03:45, 9 June 2022
- ...focuses on problems of reconstructing homogeneous (often [[convex polytope|convex]]) objects from tomographic data (this might be X-rays, projections, sectio A key theorem in this area states that any convex body in <math> E^n</math> can be determined by parallel, coplanar ...2 KB (202 words) - 02:45, 19 July 2023
- ...[[positive semidefinite matrix|positive semidefinite matrices]] forms a [[convex cone]] in {{math|'''R'''<sup>''n'' × ''n''</sup>}}, and a spectrahedr ...01|title=Spectrahedral Shadows|journal=SIAM Journal on Applied Algebra and Geometry|volume=2|pages=26–44|doi=10.1137/17m1118981|doi-access=free}}</ref> ...2 KB (325 words) - 16:24, 4 October 2024
- ...honeycomb''' is a uniform space-filling [[tessellation]] (or [[honeycomb (geometry)|honeycomb]]) in Euclidean 4-space. ...e list of 11 convex uniform tilings, 28 convex uniform honeycombs, and 143 convex uniform tetracombs)'' ...2 KB (284 words) - 19:39, 26 December 2017
- .... A classical example is the problem of enumeration of the vertices of a [[convex polytope]] specified by a [[set of linear inequalities]]:<ref>[[Eric W. Wei ...inequalities given the vertices is called ''[[facet enumeration]]'' (see [[convex hull algorithms]]). ...3 KB (446 words) - 19:49, 6 August 2022
- ...that have two or more shortest [[geodesic]]s to <math>p</math>. For every convex polyhedron, and every choice of the point <math>p</math> on its surface, cu ...of the net that do not lie along edges of the polyhedron, as a [[Blooming (geometry)|blooming]] of the polyhedron.{{r|ddhilo}} The unfolded shape of the source ...3 KB (436 words) - 07:34, 11 January 2024
- [[File:Convex layers halfspace.svg|thumb|The convex layers of a point set and their intersection with a halfplane]] ...polygon]]s having the points as their vertices. The outermost one is the [[convex hull]] of the points and the rest are formed in the same way [[recursion|re ...5 KB (636 words) - 15:40, 24 July 2023
- ...png|thumb|The two distinguished points are examples of extreme points of a convex set that are not exposed]] In mathematics, an '''exposed point''' of a [[convex set]] <math>C</math> is a point <math>x\in C</math> at which some [[continu ...2 KB (278 words) - 11:23, 20 December 2024
- ...convexity'''. Beck proved the following theorem: A Banach space is ''B''-convex [[if and only if]] every sequence of [[statistical independence|independent ...with [[norm (mathematics)|norm]] || ||. ''X'' is said to be '''''B''-convex''' if for some ''ε'' > 0 and some [[natural number]] ''n'', it ...2 KB (296 words) - 17:33, 2 November 2020
- ...the '''Blaschke sum''' of two polytopes is a polytope that has a [[Facet (geometry)|facet]] parallel to each facet of the two given polytopes, with the same [ Blaschke sums exist and are unique up to [[Translation (geometry)|translation]], as can be proven using the theory of the [[Minkowski proble ...6 KB (908 words) - 15:39, 12 October 2022
- ...ing [[honeycomb (geometry)|honeycomb]]. It can be seen as a [[Runcination (geometry)|runcination]] of the regular [[16-cell honeycomb]], containing [[Rectified ...e list of 11 convex uniform tilings, 28 convex uniform honeycombs, and 143 convex uniform tetracombs)'' Model 122 ...3 KB (327 words) - 19:39, 26 December 2017
- ...honeycomb''' is a uniform space-filling [[tessellation]] (or [[honeycomb (geometry)|honeycomb]]) in Euclidean 4-space. ...e list of 11 convex uniform tilings, 28 convex uniform honeycombs, and 143 convex uniform tetracombs)'' ...2 KB (301 words) - 19:39, 26 December 2017