In
mathematics, the Kronheimer–Mrowka basic classes are elements of the second
cohomology
In mathematics, specifically in homology theory and algebraic topology, cohomology is a general term for a sequence of abelian groups, usually one associated with a topological space, often defined from a cochain complex. Cohomology can be viewe ...
H
2(''X'') of a simple smooth 4-
manifold
In mathematics, a manifold is a topological space that locally resembles Euclidean space near each point. More precisely, an n-dimensional manifold, or ''n-manifold'' for short, is a topological space with the property that each point has a ...
''X'' that determine its
Donaldson polynomial
In mathematics, and especially gauge theory, Donaldson theory is the study of the topology of smooth 4-manifolds using moduli space
In mathematics, in particular algebraic geometry, a moduli space is a geometric space (usually a scheme or an alg ...
s. They were introduced by .
References
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{{DEFAULTSORT:Kronheimer-Mrowka basic class
Differential geometry