
(3) Let n be a positive integer. Define a simple graph Qn as follows: » The vertices are n-tuples (x1,… , xn) with x; E 10, 1) . There is an edge between (xi,… ,xn) and (yı,… , yn) if they agree in exactly n-1 coordinates (i.e., there exists i such that aj Here are drawings of Q2 and Q3: Uj ifj 2 but x, y.) 001 011 101- 111 01
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