mathematical notation

last edited Sat, 29 Mar 2025 06:59:24 GMT
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sequence: objects in order (7,21,57) =/= (57,7,21)

set: unordered objects {7,21,57} = {57,7,21}

cartesian product: A = {1,2} , B ={x,y}

A x B = {(1,x),(1,y),(2,x),(2,y)}