For the large sparse block two-by-two real nonsingular matrices, we establish a general framework of practical and efficient structured preconditioners through matrix transformation and matrix ...
A block-structured model for the reconstruction of directed and weighted financial networks spanning multiple countries is developed. In a first step, link probability matrixes are derived via a ...
Journal of Applied Probability, Vol. 27, No. 3 (Sep., 1990), pp. 557-576 (20 pages) In this paper we consider two-dimensional Markov chains with the property that, except for some boundary conditions, ...
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