The Tutte Polynomial of Some Matroids

<table>Bases of <svg height="15.4" id="M381" style="vertical-align:-3.3907pt" version="1.1" viewbox="0 0 23.8125 15.4" width="23.8125" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.012,0,0,-.012,17.413,15.188)"><path d="M285 378v-2q65 -13 102 -54.5t37 -97.5q0 -57 -30.5 -104.5t-74 -75t-85.5 -42t-72 -14.5q-31 0 -59.5 11t-40.5 23q-19 18 -16 36q1 16 23 33q13 10 24 0q58 -51 124 -51q55 0 88 40t33 112q0 64 -39 96.5t-88 32.5q-29 0 -64 -11l-6 29q77 25 118 57.5t41 84.5
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</svg> with their internal and external activity.</table>

International Journal of Combinatorics

The Tutte Polynomial of Some Matroids

Figure 5