Invariants of a class of transformation groups II.
Invariants of a class of transformation groups II. (Short Communication).
Inversion formulas for the Dunkl intertwining operator and its dual on spaces of functions and distributions.
Inversions in Locally Affine Circular Spaces.
Involutorische Automorphismen von Laguerre-Ebenen mit genau zwei Fixpunkten.
Involutory Collineations of Finite Planes.
Inzidenzgruppen der Ordnung 3.
Isodynamic systems in Euclidean spaces and an -dimensional analogue of a theorem by Pompeiu
Isometric imbeddings of Euclidean spaces into finite dimensional -spaces
It is shown that imbeds isometrically into provided that n is a prime power plus one, in the complex case. This and similar imbeddings are constructed using elementary techniques from number theory, combinatorics and coding theory. The imbeddings are related to existence of certain cubature formulas in numerical analysis.
Isometrien in normierten Räumen.
Isometries of spaces of convex compact subsets of globally non-positively Busemann curved spaces
We consider the Hausdorff metric on the space of compact convex subsets of a proper, geodesically complete metric space of globally non-positive Busemann curvature in which geodesics do not split, and characterize their surjective isometries. Moreover, an analogous characterization of the surjective isometries of the space of compact subsets of a proper, uniquely geodesic, geodesically complete metric space in which geodesics do not split is given.
Isometries of systolic spaces
We provide a classification of isometries of systolic complexes corresponding to the classification of isometries of CAT(0)-spaces. We prove that any isometry of a systolic complex either fixes the barycentre of some simplex (elliptic case) or stabilizes a thick geodesic (hyperbolic case). This leads to an alternative proof of the fact that finitely generated abelian subgroups of systolic groups are undistorted.
Isometries on linear -normed spaces.
Isomorphism of projective planes and isotopism of planar ternary rings
Isomorphisms between Subiaco -clan geometries.
Isonemality and mononemality of woven fabrics
The paper studies the diagrams of woven fabrics consisting of white and black squares as geometrical objects and described their symmetries. The concepts of isonemality and mononemality due to B. Grünbaum and G. C. Shephard are used. A conjecture of these authors is proved in a particular case.
Isoperimetrische Ungleichung für geschlossene Raumsechsecke
Isotopic invariants of natural planar ternary rings
In the paper the invariant (geometrical) character of some properties of natural planar ternary rings is shown by using isotopic transformations.
Iteration einer n-Ecksabbildung.
Iteration on Teichmüller space.