Numerical Invariants via Abstract Machines

Author(s):  
Zachary Kincaid
2007 ◽  
Author(s):  
Stephen Crago
Keyword(s):  

2014 ◽  
Vol 49 (9) ◽  
pp. 363-376 ◽  
Author(s):  
Beniamino Accattoli ◽  
Pablo Barenbaum ◽  
Damiano Mazza
Keyword(s):  

Author(s):  
Heriberto Cuayahuitl ◽  
Steve Renals ◽  
Oliver Lemon ◽  
Hiroshi Shimodaira

This paper contributes new numerical invariants to the topology of a certain class of polyhedra. These invariants, together with the Betti numbers and coefficients of torsion, characterize the homotopy type of one of these polyhedra. They are also applied to the classification of continuous mappings of an ( n + 2)-dimensional polyhedron into an ( n + 1)-sphere ( n > 2).


2012 ◽  
Vol 12 (03) ◽  
pp. 1250179 ◽  
Author(s):  
A. AZIMI ◽  
A. ERFANIAN ◽  
M. FARROKHI D. G.

Let R be a commutative ring with nonzero identity. Then the Jacobson graph of R, denoted by 𝔍R, is defined as a graph with vertex set R\J(R) such that two distinct vertices x and y are adjacent if and only if 1 - xy is not a unit of R. We obtain some graph theoretical properties of 𝔍R including its connectivity, planarity and perfectness and we compute some of its numerical invariants, namely diameter, girth, dominating number, independence number and vertex chromatic number and give an estimate for its edge chromatic number.


2003 ◽  
Vol 132 (4) ◽  
pp. 981-986 ◽  
Author(s):  
Josep Àlvarez Montaner

Author(s):  
Malgorzata Biernacka ◽  
Dariusz Biernacki ◽  
Serguei Lenglet ◽  
Piotr Polesiuk ◽  
Damien Pous ◽  
...  
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