In this paper we identify the sign pattern matrices that occur among the N–matrices, the P–matrices and the M–matrices. We also address to the class of inverse M–matrices and the related admissibility of sign pattern matrices problem.Fundação para a Ciência e a Tecnologia (FCT)Spanish DGI grant number MTM2007-6447
An m by n sign pattern S is an m by n matrix with entries in {+,-, 0}. Such a sign pattern allows a ...
summary:By a sign pattern (matrix) we mean an array whose entries are from the set $\lbrace +,-,0\rb...
A P0-matrix is a real square matrix all of whose principle minors are nonnegative. In this paper, we...
AbstractIn this paper we identify the sign pattern matrices that occur among the N-matrices, the P-m...
AbstractFor sign patterns corresponding to directed or undirected cycles, we identify conditions und...
summary:By a sign pattern (matrix) we mean an array whose entries are from the set $\lbrace +,-,0\rb...
summary:By a sign pattern (matrix) we mean an array whose entries are from the set $\lbrace +,-,0\rb...
AbstractIf A is an n × n sign pattern matrix, then Q(A) denotes the set of all real n×n matrices B s...
For sign patterns corresponding to directed or undirected cycles, we identify conditions under which...
AbstractIf A is an n × n sign pattern matrix, then Q(A) denotes the set of all real n×n matrices B s...
AbstractA sign pattern matrix is a matrix whose entries are from the set {+, −, 0}. For a real matri...
AbstractWe determine here the +, -,0 sign patterns which occur among the inverses of nonsingular, en...
AbstractWe study the sign pattern relationship between a matrix and its inverse. To do so we examine...
AbstractA result of Johnson, Leighton, and Robinson characterizing sign patterns of real matrices wi...
AbstractA result of Johnson, Leighton, and Robinson characterizing sign patterns of real matrices wi...
An m by n sign pattern S is an m by n matrix with entries in {+,-, 0}. Such a sign pattern allows a ...
summary:By a sign pattern (matrix) we mean an array whose entries are from the set $\lbrace +,-,0\rb...
A P0-matrix is a real square matrix all of whose principle minors are nonnegative. In this paper, we...
AbstractIn this paper we identify the sign pattern matrices that occur among the N-matrices, the P-m...
AbstractFor sign patterns corresponding to directed or undirected cycles, we identify conditions und...
summary:By a sign pattern (matrix) we mean an array whose entries are from the set $\lbrace +,-,0\rb...
summary:By a sign pattern (matrix) we mean an array whose entries are from the set $\lbrace +,-,0\rb...
AbstractIf A is an n × n sign pattern matrix, then Q(A) denotes the set of all real n×n matrices B s...
For sign patterns corresponding to directed or undirected cycles, we identify conditions under which...
AbstractIf A is an n × n sign pattern matrix, then Q(A) denotes the set of all real n×n matrices B s...
AbstractA sign pattern matrix is a matrix whose entries are from the set {+, −, 0}. For a real matri...
AbstractWe determine here the +, -,0 sign patterns which occur among the inverses of nonsingular, en...
AbstractWe study the sign pattern relationship between a matrix and its inverse. To do so we examine...
AbstractA result of Johnson, Leighton, and Robinson characterizing sign patterns of real matrices wi...
AbstractA result of Johnson, Leighton, and Robinson characterizing sign patterns of real matrices wi...
An m by n sign pattern S is an m by n matrix with entries in {+,-, 0}. Such a sign pattern allows a ...
summary:By a sign pattern (matrix) we mean an array whose entries are from the set $\lbrace +,-,0\rb...
A P0-matrix is a real square matrix all of whose principle minors are nonnegative. In this paper, we...