This book consists of eighteen articles in the area of `Combinatorial
Matrix Theory' and `Generalized Inverses of Matrices'. Original
research and expository articles presented in this publication are
written by leading Mathematicians and Statisticians working in these
areas. The articles contained herein are on the following general
topics: `matrices in graph theory', `generalized inverses of
matrices', `matrix methods in statistics' and `magic squares'. In the
area of matrices and graphs, speci_c topics addressed in this volume
include energy of graphs, q-analog, immanants of matrices and graph
realization of product of adjacency matrices. Topics in the book from
`Matrix Methods in Statistics' are, for example, the analysis of BLUE
via eigenvalues of covariance matrix, copulas, error orthogonal model,
and orthogonal projectors in the linear regression models. Moore-Penrose
inverse of perturbed operators, reverse order law in the case of
inde_nite inner product space, approximation numbers, condition numbers,
idempotent matrices, semiring of nonnegative matrices, regular matrices
over incline and partial order of matrices are the topics addressed
under the area of theory of generalized inverses. In addition to the
above traditional topics and a report on CMTGIM 2012 as an appendix, we
have an article on old magic squares from India.