On the doubly refined enumeration of alternating sign matrices and totally symmetric self-complementary plane partitions.
On the Drazin index of regular elements
It is known that the existence of the group inverse a # of a ring element a is equivalent to the invertibility of a 2 a − + 1 − aa −, independently of the choice of the von Neumann inverse a − of a. In this paper, we relate the Drazin index of a to the Drazin index of a 2 a − + 1 − aa −. We give an alternative characterization when considering matrices over an algebraically closed field. We close with some questions and remarks.
On the effect of the perturbation of a nonnegative matrix on its Perron eigenvector
On the Effective Computation of the Inertia of a Non-Hermitian Matrix.
On the efficient update of rectangular LU-factorizations subject to low rank modifications.
On the Eigenvalues of some Class of Pseudo-linear Transformations
On the Eigenvalues of Sums of Hermitian Matrices. II.
On the eigenvalues which express antieigenvalues.
On the equivalence of Hermitian inner products on topological *-algebras.
On the estimation of the -numerical range of monic matrix polynomials.
On the estimation of upper bound for solutions of perturbed discrete Lyapunov equations.
On the estrada index of graphs with given number of cut edges.
On the existence of certain matrices
On the exponent of -regular primitive matrices.
On the fast reduction of symmetric rationally generated Toeplitz matrices to tridiagonal form.
On the finite Fourier transforms of functions with infinite discontinuities.
On the finite Number of the Covariants of a Binary Quantic.
On the finiteness of the semigroup of conjugacy classes of left ideals for algebras with radical square zero
Let A be a finite-dimensional algebra over an algebraically closed field with radical square zero, and such that all simple A-modules have dimension at most two. We give a characterization of those A that have finitely many conjugacy classes of left ideals.
On the first eigenvalue of bipartite graphs.
On the Fischer inequality