Ranks of permutative matrices
HU Xiao-nan, Charles R. Johnson, Caroline E. Davis, Yimeng Zhang · Special Matrices · 2016
Abstract A new type of matrix, termed permutative, is defined and motivated herein. The focus is upon identifying circumstances under which square permutative matrices are rank deficient. Two distinct ways, along with variants upon them are given. These are a special kind of grouping of rows and a type of partition in which the blocks are again permutative. Other, results are given, along with some questions and conjectures.