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sequence_reversion [2014/02/08 18:28] nikolaj |
sequence_reversion [2014/03/21 11:11] (current) |
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===== Sequence reversion ===== | ===== Sequence reversion ===== | ||
==== Function ==== | ==== Function ==== | ||
- | | @#88DDEE: $ X $ ... set | | + | | @#55CCEE: context | @#55CCEE: $ X $ ... set | |
- | | @#FFBB00: $ \mathrm{rev}: \mathrm{FiniteSequence}(X)\to\mathrm{FiniteSequence}(X) $ | | + | | @#FFBB00: definiendum | @#FFBB00: $ \mathrm{rev}: \mathrm{FiniteSequence}(X)\to\mathrm{FiniteSequence}(X) $ | |
- | | @#55EE55: $ \pi_n(\mathrm{length}(S))=\pi_{\mathrm{length}(S)+1-n}(S)$ | | + | | @#55EE55: postulate | @#55EE55: $ \pi_n(\mathrm{length}(S))=\pi_{\mathrm{length}(S)+1-n}(S)$ | |
==== Discussion ==== | ==== Discussion ==== | ||
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=== Subset of === | === Subset of === | ||
[[Idempotent function]] | [[Idempotent function]] | ||
- | === Requirements === | + | === Context === |
[[Sequence length]] | [[Sequence length]] |