2 problems

Vogel's conjecture. The multiplication on $\Lambda$ is abelian, and $\Lambda$ is isomorphic to the polynomial algebra $R_0$. The $\Lambda$-algebra and its action on spaces of diagr…

Let $\Lambda$ be the graded commutative algebra formed from the antisymmetric subspace of connected tri-/univalent graphs with three labeled univalent vertices, and let $\Lambda_0$…