P-Q - substraction, <a, b> - n-tuple, P×Q - cartesian product, c ∈ { P∩Q } - element, I P I = 15 - cardinality, P ∩ Q = { a, b } - intersection, {} - empty set, {a, b, c} ⋃ {b, d, e} = {a, b, c, d, e} - union, a ⊆ {a, b, c} - subset, {a, b} ⊂ {a, b, c} - proper subset, A´= { f, g, Bodensee, Sonne } - complementation,
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Tutorial II
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Mathe
Zahlen und Operationen
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