Paul J. Steinhardt, P. Chaudhari
Journal of Computational Physics
A positive definite symmetric matrix is called a Stieltjes matrix provided that all its off diagonal elements are nonpositive. We characterize functions which preserve the class of Stieltjes matrices. © 1979.
Paul J. Steinhardt, P. Chaudhari
Journal of Computational Physics
Andrew Skumanich
SPIE Optics Quebec 1993
George Markowsky
J. Math. Anal. Appl.
Juliann Opitz, Robert D. Allen, et al.
Microlithography 1998