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Permutation of the Set {1,…,r}\{1,\dots,r\}

definitionCombinatoricsdef:permutation-initial-segment-2026a
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Reason: Publish permutation notation for alternating sums in differential forms. · 225 chars · 2 deps · depth 2

Statement

Let r∈Nr\in\mathbb{N}. A permutation of the set {1,…,r}\{1,\dots,r\} is a bijection

σ:{1,…,r}→{1,…,r}.\sigma:\{1,\dots,r\}\to\{1,\dots,r\}.

The set of all permutations of {1,…,r}\{1,\dots,r\} is denoted by SrS_r.

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