Higher-Dimensional Algebra II. 2-Hilbert
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John C. Baez
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Article
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1997
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Elsevier Science
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English
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A 2-Hilbert space is a category with structures and properties analogous to those of a Hilbert space. More precisely, we define a 2-Hilbert space to be an Abelian category enriched over Hilb with a V-structure, conjugate-linear on the homsets, satisfying ( fg, h) =( g, f \*h) =( f, hg\*). We also de