TU Wien:Diskrete Mathematik für Informatik VU (Gittenberger)/Übungstest 2019-11-08: Unterschied zwischen den Versionen

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1) Find three equivalent but different statements to "T is a tree". Choose two of them and prove their equivalence. 2) Apply the matrix-tree theorem to find the number of spanning forests in a graph with two components. 3) Is {{a, b, c}, {0, {a}, {b}, {c}, {a, b}, {a, c}}} an independence system? Is it even a matroid?