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...Lecture notes matrix algebra part b determinants and inverses peter j hammond revised september th university of warwick eca maths for economists outline special matrices square symmetric diagonal the identity inverse partitioned permutations their signs transpositions basic lemma on some implications introduction order determinant function permutation transposition triangular asquare has an equal number rows columns this being called its dimension principal or main a n ij is list elements ii i nn other with are o often expressed in form extra dots along...