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Odd Structures Are Odd

  1. 1. 0474671 - MU-W 2018 RIV CH eng J - Článek v odborném periodiku
    Markl, Martin
    Odd Structures Are Odd.
    Advances in Applied Clifford Algebras. Roč. 27, č. 2 (2017), s. 1567-1580. ISSN 0188-7009
    Institucionální podpora: RVO:67985840
    Klíčová slova: graded vector space * monoidal structure * Odd endomorphism operad
    Kód oboru RIV: BA - Obecná matematika
    Obor OECD: Pure mathematics
    Impakt faktor: 1.174, rok: 2017

    By an odd structure we mean an algebraic structure in the category of graded vector spaces whose structure operations have odd degrees. Particularly important are odd modular operads which appear as Feynman transforms of modular operads and, as such, describe some structures of string field theory. We will explain how odd structures are affected by the choice of the monoidal structure of the underlying category. We will then present two ‘natural’ and ‘canonical’ constructions of an odd modular endomorphism operad leading to different results, only one being correct. This contradicts the generally accepted belief that the systematic use of the Koszul sign rule leads to correct signs.
    Trvalý link: http://hdl.handle.net/11104/0271670
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