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InverseGlaisherFranklin from IntegerPartition ​

The inverse of GlaisherFranklin: repeated parts merge into doubled parts, and a leftover part splits into copies of its odd part.

IntegerPartition → IntegerPartitionbijectioninverse

FindStat's Mp00313. It sends the number of distinct repeated part sizes to the number of distinct even part sizes.

Called as CombinatorialMap(x, "InverseGlaisherFranklin"). The head's page has its examples.

Live

Explore

Each element of IntegerPartition at a size, and its image, applied in your browser; sizes past 7 are not offered.

Properties

Transport a statistic

Pick a statistic on IntegerPartition. Its distribution over the images of IntegerPartition at each size is computed, and compared with the 165 statistics on IntegerPartition: those that share it are the ones the map sends it to, as far as the sizes computed show.

FindStat Mp00313

Glaisher-Franklin inverse

Matched by value: our map agrees with FindStat's image on each of the 29 rows of size at most 6 we can read (0 unread; its table has 1200 rows).

BijectionGraded mapas FindStat records them, checked by FindStat's contributors.

The Glaisher-Franklin bijection on integer partitions.
ObjectImage
[1][1]
[2][1,1]
[3][3]
[4][1,1,1,1]

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/Mp00313 has the rest.