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...Calculus ii basic matrix operations ryan c daileda terminology amatrix is a rectangular array of numbers for example or the in any are called its entries organized into rows and columns which simply horizontal vertical resp lists appearing if m then whereas it worth noting that an n will have with each number row vice versa this readily apparent examples above dimensions has we say note always list rst so four matrices respectively mare nmatrix square thus only second can more easily refer to various index from left right top bottom column third etc use numbering scheme call entry located i j b write down variable variables subscripts indicate their position using convention described generic therefore be denoted mn just short ij form appropriately vector notice since single used likewise looks like r when word no qualication usually mean vectors give us another shorthand writing set...