A Proof of the Dittert Conjecture via Boundary Rigidity

Xinan Dai, Wenhao Deng, Yingdong Shi +2

Let ${\mathcal{K}}_n$ be the simplex of nonnegative $n\times n$ matrices whose entries sum to $n$. For $A$ in ${\mathcal{K}}_n$, with row sums $r_1,\dots ,r_n$ and column sums $c_1,\l…