Triple clasp formulas for C2 webs

Using the light ladder basis for Kuperberg's C2 webs, we derive triple clasp formulas idempotents projecting to top summand in each tensor product of fundamental representations. We then find explicit coefficients occurring clasps, by computing these as local intersection forms. Our provide further evidence Elias's conjecture, which was given type A and suggests how generalize conjecture non-simply laced types.