Wiktionary

Donaldson-Thomas invariant

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Etymology

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Introduced in 1998 by Simon Donaldson and Richard Thomas.

Noun

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Donaldson-Thomas invariant (plural Donaldson-Thomas invariants)

  1. (algebraic geometry) Given a compact moduli space of sheaves on a Calabi-Yau threefold, its Donaldson-Thomas invariant is the virtual number of its points, i.e., the integral of the cohomology class 1 against the virtual fundamental class.
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