Smooth four-manifold
= Smooth four-manifold
A smooth four-manifold is a four-dimensional <smooth manifold>. Its <intersection form> and gauge-theoretic invariants impose strong constraints on its possible smooth and symplectic structures.
= Smooth four-manifold
A smooth four-manifold is a four-dimensional <smooth manifold>. Its <intersection form> and gauge-theoretic invariants impose strong constraints on its possible smooth and symplectic structures.