Characterising inflations of monotone grid classes of permutations
classification
🧮 math.CO
keywords
classesmonotonepermutationpermutationssimplecharacterisationcharacterisecharacterising
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We characterise those permutation classes whose simple permutations are monotone griddable. This characterisation is obtained by identifying a set of nine substructures, at least one of which must occur in any simple permutation containing a long sum of 21s.
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