One matroid, two pictures
Ground set $E=\{e_1,\dots,e_6\}$. Independence means linearly independent on the left, and cycle-free on the right — and they always agree.
Vectors in ℝ³
Graph on {A,B,C,D}
The ground set drawn as six vectors, or as the six edges of a graph
Independence
Exchange axiom
Clear
editing
set A
set B