Indices: Difference between revisions

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== Mathematical interpretation ==
== Mathematical interpretation ==


Indices may be viewed as a way to convert between two ways of writing [https://en.wikipedia.org/wiki/Multiset multisets] of array [[Index|indices]]. The argument uses a dense representation indicating for each index the number of times it appears, and the result uses a sparse representation which lists all the indices contained in the set.
Indices may be viewed as a way to convert between two ways of writing [[wikipedia:multiset|multiset]]s of array [[Index|indices]]. The argument uses a dense representation indicating for each index the number of times it appears, and the result uses a sparse representation which lists all the indices contained in the set.


== Documentation ==
== Documentation ==

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