The tutte polynomial of a ported matroid
Journal of Combinatorial Theory Series B
Generalized activites and the Tutte polynomial
Discrete Mathematics
External and internal elements of a matroid basis
Discrete Mathematics
Partitions of a finite Boolean lattice into intervals
European Journal of Combinatorics
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We show that in an ordered matroid the partial derivative @?^p^+^qt/@?x^p@?y^q of the Tutte polynomial is p!q! times the generating function of activities of subsets with corank p and nullity q. More generally, this property holds for the 3-variable Tutte polynomial of a matroid perspective.