Results 81 to 90 of about 155,178 (312)
Infinite Lexicographic Products of Triangular Algebras [PDF]
arXiv, 1994 Some new connections are given between linear orderings and triangular operator algebras. A lexicograhic product is defined for triangular operator algebras and the Jacobson radical of an infinite lexicographic product of upper triangular matrix algebras is determined.
arxiv
Approximate Joint Matrix Triangularization
, 2016 19 ...
Colombo, Nicolo, Vlassis, Nikos
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Globally analytic triangularization of a matrix function
Linear Algebra and its Applications, 1992 AbstractA well-known fundamental theorem of Schur guarantees that every constant matrix A is unitarily similar to a triangular matrix. If A(t) is a matrix-valued function analytic on [a, b] with real eigenvalues, it is shown in this paper via a constructive algorithm that there exists a unitary matrix U(t) analytic on [a, b] such that U∗(t)A(t)U(t) is ...
Harry Gingold, Po-Fang Hsieh
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Advanced Engineering Materials, EarlyView.This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley +1 more source
Involutions for upper triangular matrix algebras
Advances in Applied Mathematics, 2006 AbstractIn this paper we describe completely the involutions of the first kind of the algebra UTn(F) of n×n upper triangular matrices. Every such involution can be extended uniquely to an involution on the full matrix algebra. We describe the equivalence classes of involutions on the upper triangular matrices.
DI VINCENZO, Onofrio Mario +2 more
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High‐Entropy Ti, Zr, Hf, Ta Multiphase Diboride with Deformation Resistance up to 2000 °C
Advanced Engineering Materials, EarlyView.Ceramics are brittle and strength decreases with temperature. The multiphase high‐entropy (Ti0.25Ta0.25Hf0.25Zr0.25)B2 with heterogeneity at the nano‐ and microscale demonstrates deformation resistance up to 2000 °C, with maximum bending strength at 1800 °C.
Petre Badica +3 more
wiley +1 more source
Algorithms for triangular decomposition of block Hankel and Toeplitz matrices with application to factoring positive matrix polynomials [PDF]
, 1973 J. Rissanen
openalex +2 more sources
Derived Equivalences of Upper Triangular Differential Graded Algebras [PDF]
arXiv, 2009 This paper generalises a result for upper triangular matrix rings to the situation of upper triangular matrix DGA's. An upper triangular matrix DGA has the form (R,S,M) where R and S are differential graded algebras and M is a DG-left-R-right-S-bimodule. We show that under certain conditions on the DG-module M and with the existance of a DG-R-module X,
arxiv
On the Segre characteristic of a block triangular matrix
Linear Algebra and its Applications, 1999 AbstractConsider two complex matrices A and B of sizes n×n and m×m respectively, and let λ be an eigenvalue of both matrices. If α=(n1,n2) and β=(m1,m2) are the Segre characteristics associated with λ of A and B, respectively, and γ=(r1,r2,r3,r4) is a nonincreasing sequence of nonnegative integers, then a method for determining when γ is the Segre ...
Ana M. Urbano, Rafael Cantó
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From Nature to Engineering: Mortar Volume and Interfacial Mechanics in Bioinspired Ceramics
Advanced Engineering Materials, EarlyView.Inspired by natural armors like nacre, this study explores how varying the volume fraction of the soft mortar layer impacts the interfacial strength and toughness of bioinspired ceramics. Experimental and computational analysis reveals that higher mortar volumes increase energy dissipation but reduce interfacial stiffness, offering insights for ...
Ehsan Azad +4 more
wiley +1 more source