Combinatorics of q,r-analogues of Stirling numbers of type B

Abstract: Stirling number of the first and the second kinds have seen many generalizations and applications in various areas of mathematics. We introduce some combinatorial parameters which realize $q$-analogues and Broder's $r$-variants of Stirling numbers of type $B$ of both kinds, which count signed set partitions and signed permutations respectively. Applications to orthogonality relations and power sums are given.