In analogy with the classical Minkowski problem, necessary and sufficient
conditions are given to assure that a given measure on the unit sphere is the cone-volume
measure of the unit ball of a finite dimensional Banach space.
Petty proved that a convex body in R^n has the minimal surface area amongst its SL(n)images, if, and only if, its surface area measure is isotropic. By introducing a new notion of minimal Orlicz surface area, we generalize this result to the Orlicz setting. The analog of Ball’s reverse isoperimetric inequality is established.
In this paper, we establish a number of Lp-affine isoperimetric inequalities for Lp-geominimal surface area. In particular, we obtain a Blaschke–
Santal´o type inequality and a cyclic inequality between different Lp-geominimal surface
areas of a convex body.
A discrete conformality for polyhedral metrics on surfaces is introduced in this paper which generalizes
earlier work on the subject. It is shown that each polyhedral metric on a surface is discrete
conformal to a constant curvature polyhedral metric which is unique up to scaling. Furthermore, the
constant curvature metric can be found using a discrete Yamabe flow with surgery.
The Orlicz–Legendre ellipsoids, which are in the framework of emerging
dual Orlicz Brunn–Minkowski theory, are introduced for the first time. They are in
some sense dual to the recently found Orlicz–John ellipsoids, and have largely generalized
the classical Legendre ellipsoid of inertia. Several new affine isoperimetric
inequalities are established. The connection between the characterization of Orlicz–
Legendre ellipsoids and isotropy of measures is demonstrated.
A simplicial complex Δ is called$flag$if all minimal nonfaces of Δ have at most two elements. The following are proved: First, if Δ is a flag simplicial pseudomanifold of dimension$d$−1, then the graph of Δ (i) is (2$d$−2)-vertex-connected and (ii) has a subgraph which is a subdivision of the graph of the$d$-dimensional cross-polytope. Second, the$h$-vector of a flag simplicial homology sphere Δ of dimension$d$−1 is minimized when Δ is the boundary complex of the$d$-dimensional cross-polytope.