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Irreducible function bases of isotropic invariants of a third order three-dimensional symmetric and traceless tensor
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作者 Yannan CHEN Shenglong HU +1 位作者 Liqun QI Wennan ZOU 《Frontiers of Mathematics in China》 SCIE CSCD 2019年第1期1-16,共16页
Third order three-dimensional symmetric and traceless tensors play an important role in physics and tensor representation theory. A minimal integrity basis of a third order three-dimensional symmetric and traceless te... Third order three-dimensional symmetric and traceless tensors play an important role in physics and tensor representation theory. A minimal integrity basis of a third order three-dimensional symmetric and traceless tensor has four invariants with degrees two, four, six, and ten, respectively. In this paper, we show that any minimal integrity basis of a third order three-dimensional symmetric and traceless tensor is also an irreducible function basis of that tensor, and there is no syzygy relation among the four invariants of that basis, i.e., these four invariants are algebraically independent. 展开更多
关键词 Minimal integrity BASIS IRREDUCIBLE FUNCTION BASIS SYMMETRIC and TRACELESS TENSOR syzygy
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NEW ICA ALGORITHMS BASED ON SPECIAL LINEAR GROUP
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作者 HANG TAN XIANHE HUANG +1 位作者 YING TANG HUACHUN TAN 《International Journal of Modeling, Simulation, and Scientific Computing》 EI 2013年第1期119-131,共13页
Unlike the traditional independent component analysis(ICA)algorithms and some recently emerging linear ICA algorithms that search for solutions in the space of general matrices or orthogonal matrices,in this paper we ... Unlike the traditional independent component analysis(ICA)algorithms and some recently emerging linear ICA algorithms that search for solutions in the space of general matrices or orthogonal matrices,in this paper we propose two new methods which only search for solutions in the space of the matrices with unitary determinant and without whitening.The new algorithms are based on the special linear group SL(n).In order to achieve our target,we first provide a representation theory for any matrix in SL(n),which only simply uses the product of multiple exponentials of traceless matrices.Based on the matrix representation theory,two novel ICA algorithms are developed along with simple analysis on their equilibrium points.Moreover,we apply our methods to the classical problem of signal separation.The experimental results indicate that the superior convergence of our proposed algorithms,which can be expected as two viable alternatives to the ICA algorithms available in publications. 展开更多
关键词 Independent component analysis special linear group matrix exponential traceless matrices signal separation.
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