***************************************************************************** * www.FindStat.org - The Combinatorial Statistic Finder * * * * Copyright (C) 2019 The FindStatCrew * * * * This information is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * ***************************************************************************** ----------------------------------------------------------------------------- Statistic identifier: St000698 ----------------------------------------------------------------------------- Collection: Integer partitions ----------------------------------------------------------------------------- Description: The number of 2-rim hooks removed from an integer partition to obtain its associated 2-core. For any positive integer $k$, one associates a $k$-core to a partition by repeatedly removing all rim hooks of size $k$. This statistic counts the $2$-rim hooks that are removed in this process to obtain a $2$-core. ----------------------------------------------------------------------------- References: ----------------------------------------------------------------------------- Code: def statistic(L): k = 2 return (sum(L)-sum(L.core(k)))/k ----------------------------------------------------------------------------- Statistic values: [2] => 1 [1,1] => 1 [3] => 1 [2,1] => 0 [1,1,1] => 1 [4] => 2 [3,1] => 2 [2,2] => 2 [2,1,1] => 2 [1,1,1,1] => 2 [5] => 2 [4,1] => 1 [3,2] => 2 [3,1,1] => 2 [2,2,1] => 2 [2,1,1,1] => 1 [1,1,1,1,1] => 2 [6] => 3 [5,1] => 3 [4,2] => 3 [4,1,1] => 3 [3,3] => 3 [3,2,1] => 0 [3,1,1,1] => 3 [2,2,2] => 3 [2,2,1,1] => 3 [2,1,1,1,1] => 3 [1,1,1,1,1,1] => 3 [7] => 3 [6,1] => 2 [5,2] => 3 [5,1,1] => 3 [4,3] => 2 [4,2,1] => 3 [4,1,1,1] => 2 [3,3,1] => 3 [3,2,2] => 3 [3,2,1,1] => 3 [3,1,1,1,1] => 3 [2,2,2,1] => 2 [2,2,1,1,1] => 3 [2,1,1,1,1,1] => 2 [1,1,1,1,1,1,1] => 3 [8] => 4 [7,1] => 4 [6,2] => 4 [6,1,1] => 4 [5,3] => 4 [5,2,1] => 1 [5,1,1,1] => 4 [4,4] => 4 [4,3,1] => 4 [4,2,2] => 4 [4,2,1,1] => 4 [4,1,1,1,1] => 4 [3,3,2] => 4 [3,3,1,1] => 4 [3,2,2,1] => 4 [3,2,1,1,1] => 1 [3,1,1,1,1,1] => 4 [2,2,2,2] => 4 [2,2,2,1,1] => 4 [2,2,1,1,1,1] => 4 [2,1,1,1,1,1,1] => 4 [1,1,1,1,1,1,1,1] => 4 [9] => 4 [8,1] => 3 [7,2] => 4 [7,1,1] => 4 [6,3] => 3 [6,2,1] => 4 [6,1,1,1] => 3 [5,4] => 4 [5,3,1] => 4 [5,2,2] => 4 [5,2,1,1] => 4 [5,1,1,1,1] => 4 [4,4,1] => 4 [4,3,2] => 3 [4,3,1,1] => 3 [4,2,2,1] => 3 [4,2,1,1,1] => 4 [4,1,1,1,1,1] => 3 [3,3,3] => 4 [3,3,2,1] => 3 [3,3,1,1,1] => 4 [3,2,2,2] => 4 [3,2,2,1,1] => 4 [3,2,1,1,1,1] => 4 [3,1,1,1,1,1,1] => 4 [2,2,2,2,1] => 4 [2,2,2,1,1,1] => 3 [2,2,1,1,1,1,1] => 4 [2,1,1,1,1,1,1,1] => 3 [1,1,1,1,1,1,1,1,1] => 4 [10] => 5 [9,1] => 5 [8,2] => 5 [8,1,1] => 5 [7,3] => 5 [7,2,1] => 2 [7,1,1,1] => 5 [6,4] => 5 [6,3,1] => 5 [6,2,2] => 5 [6,2,1,1] => 5 [6,1,1,1,1] => 5 [5,5] => 5 [5,4,1] => 2 [5,3,2] => 5 [5,3,1,1] => 5 [5,2,2,1] => 5 [5,2,1,1,1] => 2 [5,1,1,1,1,1] => 5 [4,4,2] => 5 [4,4,1,1] => 5 [4,3,3] => 5 [4,3,2,1] => 0 [4,3,1,1,1] => 5 [4,2,2,2] => 5 [4,2,2,1,1] => 5 [4,2,1,1,1,1] => 5 [4,1,1,1,1,1,1] => 5 [3,3,3,1] => 5 [3,3,2,2] => 5 [3,3,2,1,1] => 5 [3,3,1,1,1,1] => 5 [3,2,2,2,1] => 2 [3,2,2,1,1,1] => 5 [3,2,1,1,1,1,1] => 2 [3,1,1,1,1,1,1,1] => 5 [2,2,2,2,2] => 5 [2,2,2,2,1,1] => 5 [2,2,2,1,1,1,1] => 5 [2,2,1,1,1,1,1,1] => 5 [2,1,1,1,1,1,1,1,1] => 5 [1,1,1,1,1,1,1,1,1,1] => 5 [11] => 5 [10,1] => 4 [9,2] => 5 [9,1,1] => 5 [8,3] => 4 [8,2,1] => 5 [8,1,1,1] => 4 [7,4] => 5 [7,3,1] => 5 [7,2,2] => 5 [7,2,1,1] => 5 [7,1,1,1,1] => 5 [6,5] => 4 [6,4,1] => 5 [6,3,2] => 4 [6,3,1,1] => 4 [6,2,2,1] => 4 [6,2,1,1,1] => 5 [6,1,1,1,1,1] => 4 [5,5,1] => 5 [5,4,2] => 5 [5,4,1,1] => 5 [5,3,3] => 5 [5,3,2,1] => 4 [5,3,1,1,1] => 5 [5,2,2,2] => 5 [5,2,2,1,1] => 5 [5,2,1,1,1,1] => 5 [5,1,1,1,1,1,1] => 5 [4,4,3] => 5 [4,4,2,1] => 4 [4,4,1,1,1] => 5 [4,3,3,1] => 4 [4,3,2,2] => 4 [4,3,2,1,1] => 4 [4,3,1,1,1,1] => 4 [4,2,2,2,1] => 5 [4,2,2,1,1,1] => 4 [4,2,1,1,1,1,1] => 5 [4,1,1,1,1,1,1,1] => 4 [3,3,3,2] => 5 [3,3,3,1,1] => 5 [3,3,2,2,1] => 5 [3,3,2,1,1,1] => 4 [3,3,1,1,1,1,1] => 5 [3,2,2,2,2] => 5 [3,2,2,2,1,1] => 5 [3,2,2,1,1,1,1] => 5 [3,2,1,1,1,1,1,1] => 5 [3,1,1,1,1,1,1,1,1] => 5 [2,2,2,2,2,1] => 4 [2,2,2,2,1,1,1] => 5 [2,2,2,1,1,1,1,1] => 4 [2,2,1,1,1,1,1,1,1] => 5 [2,1,1,1,1,1,1,1,1,1] => 4 [1,1,1,1,1,1,1,1,1,1,1] => 5 [12] => 6 [11,1] => 6 [10,2] => 6 [10,1,1] => 6 [9,3] => 6 [9,2,1] => 3 [9,1,1,1] => 6 [8,4] => 6 [8,3,1] => 6 [8,2,2] => 6 [8,2,1,1] => 6 [8,1,1,1,1] => 6 [7,5] => 6 [7,4,1] => 3 [7,3,2] => 6 [7,3,1,1] => 6 [7,2,2,1] => 6 [7,2,1,1,1] => 3 [7,1,1,1,1,1] => 6 [6,6] => 6 [6,5,1] => 6 [6,4,2] => 6 [6,4,1,1] => 6 [6,3,3] => 6 [6,3,2,1] => 1 [6,3,1,1,1] => 6 [6,2,2,2] => 6 [6,2,2,1,1] => 6 [6,2,1,1,1,1] => 6 [6,1,1,1,1,1,1] => 6 [5,5,2] => 6 [5,5,1,1] => 6 [5,4,3] => 3 [5,4,2,1] => 6 [5,4,1,1,1] => 3 [5,3,3,1] => 6 [5,3,2,2] => 6 [5,3,2,1,1] => 6 [5,3,1,1,1,1] => 6 [5,2,2,2,1] => 3 [5,2,2,1,1,1] => 6 [5,2,1,1,1,1,1] => 3 [5,1,1,1,1,1,1,1] => 6 [4,4,4] => 6 [4,4,3,1] => 6 [4,4,2,2] => 6 [4,4,2,1,1] => 6 [4,4,1,1,1,1] => 6 [4,3,3,2] => 6 [4,3,3,1,1] => 6 [4,3,2,2,1] => 6 [4,3,2,1,1,1] => 1 [4,3,1,1,1,1,1] => 6 [4,2,2,2,2] => 6 [4,2,2,2,1,1] => 6 [4,2,2,1,1,1,1] => 6 [4,2,1,1,1,1,1,1] => 6 [4,1,1,1,1,1,1,1,1] => 6 [3,3,3,3] => 6 [3,3,3,2,1] => 3 [3,3,3,1,1,1] => 6 [3,3,2,2,2] => 6 [3,3,2,2,1,1] => 6 [3,3,2,1,1,1,1] => 6 [3,3,1,1,1,1,1,1] => 6 [3,2,2,2,2,1] => 6 [3,2,2,2,1,1,1] => 3 [3,2,2,1,1,1,1,1] => 6 [3,2,1,1,1,1,1,1,1] => 3 [3,1,1,1,1,1,1,1,1,1] => 6 [2,2,2,2,2,2] => 6 [2,2,2,2,2,1,1] => 6 [2,2,2,2,1,1,1,1] => 6 [2,2,2,1,1,1,1,1,1] => 6 [2,2,1,1,1,1,1,1,1,1] => 6 [2,1,1,1,1,1,1,1,1,1,1] => 6 [1,1,1,1,1,1,1,1,1,1,1,1] => 6 ----------------------------------------------------------------------------- Created: Feb 20, 2017 at 10:33 by Christian Stump ----------------------------------------------------------------------------- Last Updated: Feb 20, 2017 at 11:17 by Christian Stump