2 problems

Let $(X_1,\ldots,X_N)$ be a generic complex $(n,N)$-Lagrangian configuration with $N=2n+3$, and let $c_i$ be the resulting $(2n+3)$-periodic basic symplectic cross-ratios. The asso…

Given an $(n,N)$-Lagrangian configuration $(X_1,\ldots,X_N)$, choose nonzero representatives $x_i$ on the lines $X_i$, extend them to an $N$-antiperiodic sequence, and write…