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The Dirichlet Hopf Algebra of Arithmetics


Fauser, B and Jarvis, PD, The Dirichlet Hopf Algebra of Arithmetics, Journal of Knot Theory and Its Ramifications, 16, (4) pp. 379-438. ISSN 0218-2165 (2007) [Refereed Article]

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Copyright Statement

Copyright © 2007 World Scientific Publishing Co. All rights reserved.

DOI: doi:10.1142/S0218216507005269


Many constructs in mathematical physics entail notational complexities, deriving from the manipulation of various types of index sets which often can be reduced to labelling by various multisets of integers. In this work, we develop systematically the "Dirichlet Hopf algebra of arithmetics" by dualizing the addition and multiplication maps. Then we study the additive and multiplicative antipodal convolutions which fail to give rise to Hopf algebra structures, but form only a weaker Hopf gebra obeying a weakened homomorphism axiom. A careful identification of the algebraic structures involved is done featuring subtraction, division and derivations derived from coproducts and chochains using branching operators. The consequences of the weakened structure of a Hopf gebra on cohomology are explored, showing this has major impact on number theory. This features multiplicativity versus complete multiplicativity of number theoretic arithmetic functions. The deficiency of not being a Hopf algebra is then cured by introducing an "unrenormalized" coproduct and an "unrenormalized" pairing. It is then argued that exactly the failure of the homomorphism property (complete multiplicativity) for non-coprime integers is a blueprint for the problems in quantum field theory (QFT) leading to the need for renormalization. Renormalization turns out to be the morphism from the algebraically sound Hopf algebra to the physical and number theoretically meaningful Hopf gebra (literally: antipodal convolution). This can be modelled alternatively by employing Rota–Baxter operators. We stress the need for a characteristic-free development where possible, to have a sound starting point for generalizations of the algebraic structures. The last section provides three key applications: symmetric function theory, quantum (matrix) mechanics, and the combinatorics of renormalization in QFT which can be discerned as functorially inherited from the development at the number-theoretic level as outlined here. Hence the occurrence of number theoretic functions in QFT becomes natural.

Item Details

Item Type:Refereed Article
Keywords:Hopf algebras; arithmetic; Dirichlet convolution ring; coaddition; comultiplication; symmetric functions; characteristic free quantum mechanics; renormalization
Research Division:Physical Sciences
Research Group:Other physical sciences
Research Field:Other physical sciences not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Fauser, B (Dr Bertfried Fauser)
UTAS Author:Jarvis, PD (Dr Peter Jarvis)
ID Code:44552
Year Published:2007
Funding Support:Australian Research Council (DP0208808)
Web of Science® Times Cited:3
Deposited By:Physics
Deposited On:2007-08-01
Last Modified:2012-03-01

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