The 27-Pfaffian conjecture for the reciprocal catalecticant variety
Let Cat(2,3)\mathrm{Cat}(2,3)Cat(2,3) be the catalecticant variety, let P,Cat(2,3)−1\mathbb{P}\\,\mathrm{Cat}(2,3)^{-1}P,Cat(2,3)−1 denote its reciprocal variety, and let a cubic Pfaffian mean the Pfaffian of a…