概複素構造
1. Almost complex manifoldIn mathematics, an almost complex manifold is a smooth manifold equipped with smooth linear complex structure on each tangent space. The existence of this structure is a necessary, but not sufficient, condition for a manifold to be a complex manifold. That is, every complex manifold is an almost complex manifold, but not vice-versa. Almost complex structures have important applications in symplectic geometry. The concept is due to Ehresmann and Hopf in the 1940s.
Read “Almost complex manifold” on English Wikipedia
Read “概複素構造” on Japanese Wikipedia
Read “Almost complex manifold” on DBpedia
Read “Almost complex manifold” on English Wikipedia
Read “概複素構造” on Japanese Wikipedia
Read “Almost complex manifold” on DBpedia
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