Skew-symmetric matrices and their principal minors

A. Boussairi, B. Chergui

Let $V$ be a nonempty finite set and $A=(a_{ij}{)}_{i,j\in V}$ be a matrix with entries in a field $\mathbb{K}$. For a subset $X$ of $V$, we denote by $A[X]$ the submatrix of $A$ hav…