Let M(n) be the time to multiply two n n matrices, and let L(n) be the
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Let M(n) be the time to multiply two n × n matrices, and let L(n) be the time to compute the LUP decomposition of an n × n matrix( Show that multiplying matrices and computing LUP decompositions of matrices have essentially the same difficulty: an M(n)-time matrix-multiplication algorithm implies an O(M(n))-time LUP-decomposition algorithm, and an L(n)-time LUP-decomposition algorithm implies an O(L(n))-time matrix-multiplication algorithm.
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Introduction to Algorithms
ISBN: 978-0262033848
3rd edition
Authors: Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest
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