On the number of permutations arising from a problem in cell-biology.
On the number of planar orientations with prescribed degrees.
On the number of possible row and column sums of -matrices.
On the number of prime divisors of a binomial coefficient.
On the number of rim hook tableaux
On the number of subsets relatively prime to an integer.
On the order of lacunary sums of binomial coefficients.
On the parity of the number of multiplicative partitions
On the partitions of a number into arithmetic progressions.
On the permanents of certain circulant matrices and related Toeplitz matrices. (Über die Permanente gewisser zirkulanter Matrizen und damit zusammenhängender Toeplitz-Matrizen.)
On the permutations generated by cyclic shift.
On the permutations generated by Sturmian words.
On the powers of Motzkin paths.
On the problem of uniqueness for the maximum Stirling number(s) of the second kind.
On the -analogue of the sum of cubes.
On the -Pell sequences and sums of tails
We examine the -Pell sequences and their applications to weighted partition theorems and values of -functions. We also put them into perspective with sums of tails. It is shown that there is a deeper structure between two-variable generalizations of Rogers-Ramanujan identities and sums of tails, by offering examples of an operator equation considered in a paper published by the present author. The paper starts with the classical example offered by Ramanujan and studied by previous authors noted...
On the q-log-Concavity of Gaussian Binomial Coefficients.
On the representation of abstract semigroups by transformation semigroups : Computer investigations.
On the semigroup of binary relations on a finite set
On the sequence A079500 and its combinatorial interpretations.