Regular matrix

Regular matrix may refer to:

Mathematics

• Regular stochastic matrix, a stochastic matrix such that all the entries of some power of the matrix are positive<!-- e.g. Lewis, Matrix Theory, p. 169 -->
• The opposite of irregular matrix, a matrix with a different number of entries in each row
• Regular Hadamard matrix, a Hadamard matrix whose row and column sums are all equal
• A regular element of a Lie algebra, when the Lie algebra is gl_n
• Invertible matrix (this usage is rare)<!-- e.g. Plato et al., Concise Numerical Algebra, p. 60 -->

Other uses

• QS Regular Matrix, a quadraphonic sound system developed by Sansui Electric