✦ LIBER ✦

Matroids with given restrictions and contractions

✍ Scribed by P.J Wilde

Publisher: Elsevier Science
Year: 1977
Tongue: English
Weight: 450 KB
Volume: 22
Category: Article
ISSN: 0095-8956
DOI: 10.1016/0095-8956(77)90004-1

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Vector representable matroids of given r

Vector representable matroids of given rank with given automorphism group

✍ László Babai 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 471 KB

A simple way of as,;ociating a matroid of prescribed rank with a graph is shown. The matroids so corhstrueted are re.presentable over any sufficiently large field. Their ase is demonstrated by the fallowing result: Given an integer k >~ 3 and a hmction G associating a group with each subsel of a set

Matchings and Δ-Matroids with Coefficien

Matchings and Δ-Matroids with Coefficients

✍ Franz Kalhoff; Walter Wenzel 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 274 KB

which may be characterized by some variant of the Greedy algorithm for solving optimization problems. This paper is devoted to the examination of the particular subclass of ⌬-matroids induced by simple graphs. It is shown that these ⌬-matroids are representable over fields of any characteristic and

Graphs with given group and given consta

Graphs with given group and given constant link

✍ Walter Vogler 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 228 KB

## Abstract __A__ graph __L__ is called a link graph if there is a graph __G__ such that for each vertex of __G__ its neighbors induce a subgraph isomorphic to __L.__ Such a G is said to have constant link __.__L Sabidussi proved that for any finite group F and any __n__ ⩾ 3 there are infinitely ma

Probability distributions with given mul

Probability distributions with given multivariate marginals and given dependence structure

✍ C.M Cuadras 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 722 KB

Facilitated Ising Model with Soft Restri

Facilitated Ising Model with Soft Restrictions

✍ M. Schulz; S. Trimper 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 134 KB

An analytical approach is proposed to include dynamical constraints into a kinetic Ising model where the spins are subjected to flip processes. The relaxation time shows a non-Arrhenius behaviour. When the constraints are realized with a certain probability the relaxation time decreases further. For

Construction of Selection Indexes with R

Construction of Selection Indexes with Restrictions

✍ Dr. rer. nat. N. Mielenz 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 455 KB

I n this pa.per the problem of uniehge selection with inequality constraint9 is formulated. If the predictor and criterion variables are all normally dietributed, this problem can be written a8 a convex programming problem, with a linear objective function and with linetlr constraint8 and a quedrati