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Re: Working with arrays


If A = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
xtest = {4, 5, 6};
lA\[CenterDot]xtest (* First case *)
{{a, b}, {c, d}} . {x, y} (* Second case *)

The output is:

{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}\[CenterDot]{4, 5, 6}

{a x + b y, c x + d y}



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