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math.CO2018
Mixed restricted Stirling numbers
Somaya Barati, Beáta Bényi, Abbas Jafarzadeh +1
In this note we investigate mixed partitions with extra condition on the sizes of the blocks. We give a general formula and the generating function. We consider in more details a s…
math.CO2018
Some determinants of path generating functions, II
Christian Krattenthaler, Daniel Yaqubi
We evaluate Hankel determinants of matrices in which the entries are generating functions for paths consisting of up-steps, down-steps and level steps with a fixed starting point b…