2 problems

Let $M^n_1$ and $M^n_2$ be two closed orientable $n$-manifolds. The regular genus additivity conjecture. … Regular genus is known to be subadditive under connected sum, and the equ…

Let $M$ be a closed connected $3$-manifold. The Matveev complexity is denoted by $c(M)$, the modified Heegaard complexity by $c_{HM}(M)$, the non-minimal generalized GM-complexity…