Convex geometry
Branch of geometry
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Classification
According to the Mathematics Subject Classification MSC2010, the mathematical discipline Convex and Discrete Geometry includes three major branches:
- general convexity
- polytopes and polyhedra
- discrete geometry
(though only portions of the latter two are included in convex geometry).
General convexity is further subdivided as follows:
- axiomatic and generalized convexity
- convex sets without dimension restrictions
- convex sets in topological vector spaces
- convex sets in 2 dimensions (including convex curves)
- convex sets in 3 dimensions (including convex surfaces)
- convex sets in n dimensions (including convex hypersurfaces)
- finite-dimensional Banach spaces
- random convex sets and integral geometry
- asymptotic theory of convex bodies
- approximation by convex sets
- variants of convex sets (star-shaped, (m, n)-convex, etc.)
- Helly-type theorems and geometric transversal theory
- other problems of combinatorial convexity
- length, area, volume
- mixed volumes and related topics
- valuations on convex bodies
- inequalities and extremum problems
- convex functions and convex programs
- spherical and hyperbolic convexity
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Historical note
Convex geometry is a relatively young mathematical discipline. Although the first known contributions to convex geometry date back to antiquity and can be traced in the works of Euclid and Archimedes, it became an independent branch of mathematics at the turn of the 20th century, mainly due to the works of Hermann Brunn and Hermann Minkowski in dimensions two and three. A big part of their results was soon generalized to spaces of higher dimensions, and in 1934 T. Bonnesen and W. Fenchel gave a comprehensive survey of convex geometry in Euclidean space Rn. Further development of convex geometry in the 20th century and its relations to numerous mathematical disciplines are summarized in the Handbook of convex geometry edited by P. M. Gruber and J. M. Wills.