• Reading Sheridan's fano hypersurface paper

• What is a Frobenius algebra, and why we care? I know it has something to do with TFT, but precisely how? Here I copied down a paragraph in a (computer science paper? almost, theoretic physicist doing quantum computing)

The last condition is really hard to believe. And why do they arise in nature? Here is why, it is related to 2d TFT. the circle gives the vector space, the merge and splitting of circle gives that algebra structure. Are this higher category enough? Why so simple? How about 3d picture?