4 citations · 4 across the 5 of their papers we have counts for
5 papers
Max-tree for d-permutations and pattern avoidance
Thomas Muller
Higher dimensional permutations are tuples of d-1 permutations that can be identified with a point set in a d-dimensional grid. In N. Bonichon and P.-J. Morel, {\it J. Integer Sequ…
The congruence properties of Romik's sequence of Taylor coefficients of Jacobi's theta function
Christian Krattenthaler, Thomas W. Müller
In [Ramanujan J. 52 (2020), 275-290], Romik considered the Taylor expansion of Jacobi's theta function at and encoded it in an integer sequence …
A Riccati differential equation and free subgroup numbers for lifts of $\PSL_2(\Z)$ modulo powers of primes
Christian Krattenthaler, Thomas W. Müller
It is shown that the number of free subgroups of index in the modular group $\PSL_2(\Z)$, when considered modulo a prime power $p^\al$ with , is always (ultimatel…
Decomposable functors and the exponential principle, II
Peter Cameron, Christian Krattenthaler, Thomas W. Müller
We develop a new setting for the exponential principle in the context of multisort species, where indecomposable objects are generated intrinsically instead of being given in advan…
Parity patterns associated with lifts of Hecke groups
Christian Krattenthaler, Thomas W. Müller
Let be an odd prime, a positive integer, and let $\Ga_m(q)$ be the group generated by two elements and subject to the relations and ; tha…