Note sur des formules de Joachimsthal
O ploském obsahu kruhového výkrojku
O vypočítání obsahu komolého jehlance
O vzorci vyjadřujícím plochu čtyřúhelníka pomocí stran jeho
O vzorci vyjadřujícím plochu trojúhelníku pomocí stran jeho
On continuous preservation of norms and areas.
On distance preserving transformations of Euclidean-like planes over the rational fields.
On distance preserving transformations of Euclidean-like planes over the rational fields. (Short Communication).
On distance preserving transformations of lines in Euclidean three-space.
On Inscribed Circumscribed Conics.
On the curves of constant relative width
On the derivation of the non-Euclidean angle of parallelism function.
On the fundamental group of the fixed points of an unipotent action.
On the Group of Transformations of Constructible Euclidean Planes with Preserve a Single Distance.
On the Newton Polygon.
On the volume of a symmetric tetrahedron in hyperbolic and spherical spaces.
On the volume of hyperbolic polyhedra.
On the volume of unbounded polyhedra in the hyperbolic space.
On the volumes of hyperbolic 5-orthoschemes and the Trilogarithm.
On volumes of arithmetic quotients of
We apply G. Prasad’s volume formula for the arithmetic quotients of semi-simple groups and Bruhat-Tits theory to study the covolumes of arithmetic subgroups of . As a result we prove that for any even dimension there exists a unique compact arithmetic hyperbolic -orbifold of the smallest volume. We give a formula for the Euler-Poincaré characteristic of the orbifolds and present an explicit description of their fundamental groups as the stabilizers of certain lattices in quadratic spaces. We...