172,046 research outputs found
Minimizing the condition number of a positive definite matrix by completion
No full textElsner L, He C, Mehrmann V. Minimizing the condition number of a positive definite matrix by completion. Numerische Mathematik. 1994;69(1):17-23.We consider the problem of minimizing the spectral condition number of a positive definite matrix by completion: [GRAPHICS] where A is an n x n Hermitian positive definite matrix, B a p x n matrix and X is a free p x p Hermitian matrix. We reduce this problem to an optimization problem for a convex function in one variable. Using the minimal solution of this problem we characterize the complete set of matrices that give the minimum condition number
Convergence of infinite products of matrices and inner-outer iteration schemes
No full textElsner L, Bru R, Neumann MM. Convergence of infinite products of matrices and inner-outer iteration schemes. Electronic Transactions on Numerical Analysis. 1994;2:183-193
Second Story Landing in Elsner-Lane, Inc. House, C
No full textA second story landing in an Elsner-Lane, Inc. home.https://digitalcommons.usf.edu/gandy_street/2840/thumbnail.jp
Bedroom in Elsner-Lane, Inc. Model Home, C
No full textA bedroom in an Elsner-Lane, Inc. model home.https://digitalcommons.usf.edu/gandy_street/2827/thumbnail.jp
Portrait of a Man with Glasses, Elsner-lane, Inc., C
No full textPortrait of a man related to Elsner-Lane, Inc.https://digitalcommons.usf.edu/gandy/3963/thumbnail.jp
On measures of nonnormality of matrices
No full textElsner L, Paardekooper MHC. On measures of nonnormality of matrices. Linear algebra and its applications. 1987;92:107-123
Back of a Elsner-Lane, Inc. Model Home in Brandon, C
No full textThe back of an interior of a Elsner-Lane, Inc. model home in Brandon, Florida.https://digitalcommons.usf.edu/gandy_street/2816/thumbnail.jp
Looking down at a Living Room in Elsner-Lane, Inc. Home, C
No full textA living room taken from the second story looking down in an Elsner-Lane Inc. home.https://digitalcommons.usf.edu/gandy_street/2839/thumbnail.jp
Living Room in Elsner-Lane, Inc. Model Home in Brandon, C
No full textA living room with a fireplace in an Elsner-Lane, Inc. model home in Brandon, Florida.https://digitalcommons.usf.edu/gandy_street/2817/thumbnail.jp
A probable cause of paradoxical thrombosis in zygomycosis
No full textInvasive zygomycoses (syn. mucormycoses) are rather rare but life-threatening diseases which often take a peracute course. Particularly endangered are diabetics and patients suffering from siderophilia. Zygomycosis is regularly complicated by thrombosis and subsequent necrosis. Usually it evolves from sinusitis in a rhinocerebral form. With the use of a clinical isolate (Rhizopus microsporus) and sera of the same female survivor, we investigated possible sources of the typical blood clotting. The results suggest that coagulation is probably initiated in a bimodal manner by an extracellular serine proteinase of the fungus and by elastase from the patients' leukocytes. The former causes a partial hydrolysis of fibrinogen, while the latter activates coagulation factor XIII (fibrin stabilizing factor). Both proteinases were present in the patient at the site of infection, and in vitro they jointly bring about regular clotting of fibrinogen
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