Find A x B if A={0,1,3} and B={1,2,a,b}.
"\\begin{array}{l}\nA \\times B = \\{ (x;y)|x \\in A \\wedge y \\in B\\} = \\\\\n = \\{ (0;1),\\,(0;2),(0;a),(0;b),(1;1),\\,(1;2),(1;a),(1;b),(3;1),\\,(3;2),(3;a),(3;b)\\} \n\\end{array}"
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