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Homological integration : ウィキペディア英語版
Homological integration

In the mathematical fields of differential geometry and geometric measure theory, homological integration or geometric integration is a method for extending the notion of the integral to manifolds. Rather than functions or differential forms, the integral is defined over currents on a manifold.
The theory is "homological" because currents themselves are defined by duality with differential forms. To wit, the space ''D''''k'' of ''k''-currents on a manifold ''M'' is defined as the dual space, in the sense of distributions, of the space of ''k''-forms Ω''k'' on ''M''. Thus there is a pairing between ''k''-currents ''T'' and ''k''-forms α, denoted here by
:\langle T, \alpha\rangle.
Under this duality pairing, the exterior derivative
:d : \Omega^ \to \Omega^k
goes over to a boundary operator
:\partial : D^k \to D^
defined by
:\langle\partial T,\alpha\rangle = \langle T, d\alpha\rangle
for all α ∈ Ω''k''. This is a homological rather than cohomological construction.
==References==

*
* .


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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