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15.5.385 multisieve

multisieve, x, y, list, index

Seeks elements of y in x and returns information about the finds in list and index. In list are returned the indices to x of the found elements from y, grouped by element of y. In index are returned the start index of each group in x, and the total number of found elements is appended at the end.

For element number i from y, list(index(i): index(i + 1) - 1) is equal to sieve(x eq y(i)).

See also: sieve