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...Lecture rules for matrix math operations dylan zwick fall this covers section of the textbook basix most is about formalizing and that we ve already been using in class up to point so it should be mostly a review but necessary one if any new you please make sure understand as foundation everything else ll doing course rectangular array numbers an m by n also written rn x has rows columns can add two matrices they are same shape size addition termwise mul tiply constant c multiplication just multiplies every entry example hf i on more tricky than moving because isn t done fact have s not necessarily true multiply them only square order bto get ab number must equal b could wecould however then product will with multiplied produce row column j dot ex pressed mathematically ba does sense laws arithmetic manyofthestandardrules from ordinaryarithmetic carry over into some these ca cb ac bc perhaps interesting unexpected above bg call associativity associative obvious definition how multi pli...