2 problems

Let $X$ be a closed, connected, oriented, smooth four-dimensional manifold with $b^+(X)>1$ and odd $b^+(X)-b_1(X)$. A Seiberg–Witten basic class is a cohomology class associated wi…

Characteristic-number conjecture. For every $n$, the numbers given by the code for $n_p\geq n$ are the characteristic numbers.