On some (pseudo) involutions in the Riordan group.
On sums over partially ordered sets.
On the counting of fully packed loop configurations: some new conjectures.
On the distribution of depths in increasing trees.
On the divisibility of generalized central trinomial coefficients.
On the number of intervals in Tamari lattices. (Sur le nombre d'intervalles dans les treillis de Tamari.)
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 volume of a certain polytope.
On two combinatorial identities
On two supercongruences involving Almkvist-Zudilin sequences
We prove two supercongruences involving Almkvist-Zudilin sequences, which were originally conjectured by Z.-H. Sun (2020).
On Zeilberger's constant term for Andrew's TSSCPP theorem.
Operatormethoden für q-Identitäten.
Operatormethoden für q-Identitäten II: q-Laguerre Polynome.
Optimal Penney Ante strategy via correlation polynomial identities.