Proof of a conjecture of Meszaros and Morales on the volume of a flow   polytope
  We prove a conjecture of Meszaros and Morales on the volume of a flow polytope. Independently from our work, Zeilberger sketched a proof of their conjecture. In fact, our proof is the same as Zeilberger's proof. The purpose of this note is to give a more detailed proof of the conjecture. 
Jang Soo Kim
math.CO