Zobrazeno 1 - 10
of 434
pro vyhledávání: '"Teicher, M."'
Let $C(T)$ be a generalized Coxeter group, which has a natural map onto one of the classical Coxeter groups, either $B_n$ or $D_n$. Let $C_Y(T)$ be a natural quotient of $C(T)$, and if $C(T)$ is simply-laced (which means all the relations between the
Externí odkaz:
http://arxiv.org/abs/0803.3010
Given a singular surface X, one can extract information on it by investigating the fundamental group $\pi_1(X - Sing_X)$. However, calculation of this group is non-trivial, but it can be simplified if a certain invariant of the branch curve of X - ca
Externí odkaz:
http://arxiv.org/abs/0803.3005
We consider an inverse spectral problem with the third-order differential equation and the non-separated boundary conditions. Two theorems on the uniqueness of the solution of this problem are proved, and a method for establishing the unknown conditi
Externí odkaz:
http://arxiv.org/abs/0801.3766
The problem of finding boundary conditions for fastening of a ring membrane, which are inaccessible for direct observation from the natural frequencies of its flexural oscillations, is considered. Two theorems on the uniqueness of this problem are pr
Externí odkaz:
http://arxiv.org/abs/0801.1867
Rods are parts of various devices. If it is impossible to observe the rod directly, the only source of information about possible defects of its fastening can be the natural frequencies of its flexural vibrations. The question arises whether one woul
Externí odkaz:
http://arxiv.org/abs/0801.1872
Publikováno v:
J. Math. Sci., 149:2 (2008), 1087--1097
The classic trisecant lemma states that if $X$ is an integral curve of $\PP^3$ then the variety of trisecants has dimension one, unless the curve is planar and has degree at least 3, in which case the variety of trisecants has dimension 2. In this pa
Externí odkaz:
http://arxiv.org/abs/0712.3878
Autor:
Amram, M., Teicher, M.
In this work we obtain presentations of fundamental groups of the complements of three families of quadric arrangements in $\mathbb{P}^2$. The first arrangement is a union of $n$ quadrics, which are tangent to each other at two common points. The sec
Externí odkaz:
http://arxiv.org/abs/math/0601454
The notion of Bezout matrix is an essential tool in studying broad variety of subjects: zeroes of polynomials, stability of differential equations, rational transformations of algebraic curves, systems of commuting nonselfadjoint operators, boundarie
Externí odkaz:
http://arxiv.org/abs/math/0601047
Autor:
Liberman, E., Teicher, M.
In this paper, we prove that the Hurwitz equivalence problem for 1-factorizations in $F_2 \oplus F_2$ is undecidable, and as a consequence, the Hurwitz equivalence problem for $\Delta^2$-factorizations in the braid groups $B_n, n\geq 5$ is also undec
Externí odkaz:
http://arxiv.org/abs/math/0511153
We generalize the Moishezon Teicher algorithm that was suggested for the computation of the braid monodromy of an almost real curve. The new algorithm suits a larger family of curves, and enables the computation of braid monodromy not only of caspida
Externí odkaz:
http://arxiv.org/abs/math/0410444