Results 271 to 280 of about 2,919,635 (295)

A Minimal Regular Space that is Not Strongly Minimal Regular

Canadian Journal of Mathematics, 1976
A regular T1 space is said to be R-closed if there is no regular T1 space in which it can be embedded as a nonclosed subspace. A regular T1 space is said to be minimal regular if no regular T1 topology on the underlying set is strictly weaker than the given topology. It is known (see [1, Theorem 4, p. 455]) that every minimal regular space is R-closed.
openaire   +2 more sources

Some Remarks on Regular and Strongly Regular Rings

Canadian Mathematical Bulletin, 1975
This article presents some new algebraic and module theoretic characterizations of strongly regular rings. The latter uses Lambek’s notion of symmetry. Strongly regular rings are shown to admit an involution and form an equational category. An example due to Paré shows that the category of regular rings and ring homomorphisms between them is not ...
openaire   +1 more source

On Quasi-Strongly Regular Graphs With Parameters (n,k,a;K−1,c2)

Discrete Mathematics, 2021
Gengsheng Zhang
exaly  

New Properties of Strongly Regular Left Almost Semi-Group

Journal of Discrete Mathematical Sciences and Cryptography, 2022
Akram S Mohammed
exaly  

Regular and Strongly Regular Selfcomplementary Graphs

1982
The graphs given in the title are studied using boolean techniques. First we investigate the change of certain simple graphical parameters (like the number of triangles through a vertex) of a regular self-complementary graphs under a complementing permutation.
openaire   +1 more source

Some Constructions of Quasi-Strongly Regular Digraphs

Graphs and Combinatorics, 2022
Gengsheng Zhang
exaly  

Strongly regular and distance-regular graphs

2016
In this chapter, we discuss the basic notions and results from the theory of strongly regular and distance-regular graphs. Emphasis will be on those results that will have implications to the study of point-line geometries. A more extensive treatment of these families of graphs can be found in the books [6, 25, 69, 70].
openaire   +1 more source

On Strongly -Regular Rings and Strongly Commuting -Regular Rings

Journal of Garmian University, 2017
Abdullah Abdul-Jabbar, Lavan Mustafa
openaire   +1 more source

There Is No (95, 40, 12, 20) Strongly Regular Graph

Journal of Combinatorial Designs, 2020
Jernej Azarija, Tilen Marc
exaly  

On Quasi-Strongly Regular Graphs

Linear and Multilinear Algebra, 2006
Felix Goldberg
exaly