Generalized complex structure: Difference between revisions

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===Courant bracket===
In ordinary complex geometry, an [[almost complex structure]] is [[Foliation#FoliationsIntegrable and integrabilitysystem|integrable]] to a [[linear complex structure|complex structure]] if and only if the [[Lie derivative|Lie bracket]] of two sections of the [[Holomorphic function|holomorphic]] subbundle is another section of the holomorphic subbundle.
 
In generalized complex geometry one is not interested in vector fields, but rather in the formal sums of vector fields and one-forms. A kind of Lie bracket for such formal sums was introduced in 1990 and is called the [[Courant bracket]] which is defined by