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In the 60’s, Knuth introduced stack-sorting and serial compositions of stacks. In particular, one significant question arise out… (More)
Pattern avoidance in the symmetric group Sn has provided a number of useful connections between seemingly unrelated problems from… (More)
We analyzed a varved sequence of sediment from a 350-m depth in the north basin of Lake Malawi, East Africa, for the size… (More)
We study a group action on permutations due to Foata and Strehl and use it to prove that the descent generating polynomial of… (More)
The Late Oligocene to Recent Canterbury Drifts were deposited in water depths between c. 400 and c. 1500 m by northward-flowing… (More)
West, J., Sorting twice through a stack, Theoretical Computer Science 117 (1993) 303-313 We consider the operation of stack… (More)