Table Of Content

Contents Volume 149, April 15, 1991 Evcenji E. TyrtysHnrkov (Moscow, USSR) Cauchy-Toeplitz Matrices and Some Applications Jra-yu Suao (Shanghai, China) Bounds on the kth Eigenvalues of Trees and Forests Dennis Puitures (Middleton, Wisconsin) Resolvent Bounds and Spectral Variation RayMonp H. Cuan, X1ao-QincG JIN, AND MAN-CHUNG YEUNG (Hong Kong, China) The Circulant Operator in the Banach Algebra of Matrices Grecory AMMAR (De Kalb, Illinois) anp VoLKER MEHRMANN (Bielefeld, Germany) On Hamiltonian and Symplectic Hessenberg Forms Jerzy K. BaxsaLary (Tampere, Finland) anp Suyrr Kumar Mitra (New Dehli, India) Left-Star and Right-Star Partial Orderings Masatosui Fuji (Osaka, Japan), Takayuki Furuta (Aomori, Japan), AND E1zasuro Kamer (Osaka, Japan) Operator Functions Associated With Furuta’s Inequality PaBLo TarazaGa (Houston, Texas) More Estimates for Eigenvalues and Singular Values Jin-Hs1EN Wanc AND Pei Yuan Wu (Hsinchu, Taiwan) Products of Unipotent Matrices of Index 2 .................... 111 R. B. Bapat AND A. K. Lat (New Dehli, India) Path-Positive Graphs Eytan Patp1, Hep1 Taus PALp1, AND SHAUL GUTMAN (Haifa, Israel) The Intersection of Regions and Root Clustering Ruup H. Koninc (Groningen, The Netherlands), Heinz NEuUDECKER (Amsterdam, The Netherlands), anp Tom WanssBEEK (Groningen, The Netherlands) Block Kronecker Products and the vecb Operator Joun Hannan AND K. C. O’Meara (Christchurch, New Zealand) Products of Simultaneously Triangulable Idempotent Matrices Table of Contents Continued C. CarRsTENSEN (Hannover, Germany) Linear Construction of Companion Matrices BEN Matues (Waterville, Maine), Matyjaz OMLapIG (Jadranska, Yugoslavia), AnD Hreypar Rapyjavi (Halifax, Nova Scotia, Canada) Linear Spaces of Nilpotent Matrices Nir Couen (Rehovot, Israel) anp IzcHaxk LEwkowi1cz (Haifa, Israel) Bounds for Singular Values Based on the Eigenvectors REPORT GrorcE PooLe AND Larry NEAL (Johnson City, Tennessee) A Geometric Analysis of Gaussian Elimination. I Book REvIEW JanE M. Day (San Jose, California) Review of A Comprehensive Introduction to Linear Algebra, by Joel G. Broida and S. Gill Williamson ADDENDUM Mark S. ASHBAUGH AND RAFAEL D. BENGURIA (Columbia, Missouri) Some Eigenvalue Inequalities for a Class of Jacobi Matrices AUTHOR INDEX