𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A two-dimensional version of the Goldschmidt–Sims conjecture

✍ Scribed by Yair Glasner


Book ID
104140910
Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
284 KB
Volume
269
Category
Article
ISSN
0021-8693

No coin nor oath required. For personal study only.

✦ Synopsis


The Goldschmidt-Sims conjecture asserts that there is a finite number of (conjugacy classes of) edge transitive lattices in the automorphism group of a regular tree with prime valence. We prove a similar theorem for irreducible lattices, transitive on the 2-cells of the product of two regular trees of prime valences.


📜 SIMILAR VOLUMES


A corrected version of the Duchet kernel
✍ E. Boros; V. Gurvich 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 146 KB

In 1980, Piere Duchet conjectured that odd-directed cycles are the only edge minimal kernel-less connected digraphs, i.e. in which after the removal of any edge a kernel appears. Although this conjecture was disproved recently by Apartsin et al. (1996), the following modification of Duchet's conject

The input–output version of Aizerman's c
✍ M. I. Gil; A. Ailon 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 91 KB 👁 2 views

It is proved that non-linear systems with positive impulse functions satisfy the Aizerman conjecture in the input-output version. Besides, the stability criteria are formulated in the terms of the Hurwitzness of corresponding polynomials. In addition, new positivity conditions for impulse functions

A graph-theoretic version of the union-c
✍ El-Zahar, Mohamed H. 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 128 KB 👁 2 views

An induced subgraph S of a graph G is called a derived subgraph of G if S contains no isolated vertices. An edge e of G is said to be residual if e occurs in more than half of the derived subgraphs of G. We introduce the conjecture: Every non-empty graph contains a non-residual edge. This conjecture