@article{Kook1999ACF,
title={A Convolution Formula for the Tutte Polynomial},
author={Woong Kook and Victor Reiner and Dennis Stanton},
journal={J. Comb. Theory, Ser. B},
year={1999},
volume={76},
pages={297-300}
}

Let M be a finite matroid with rank function r. We will write A M when we mean that A is a subset of the ground set of M, and write M|A and M A for the matroids obtained by restricting M to A and contracting M on A respectively. Let M* denote the dual matroid to M. (See [1] for definitions). The main theorem is Theorem 1. The Tutte polynomial TM(x, y) satisfies TM(x, y)= : A M TM|A(0, y) TM A(x, 0). (1)