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We construct a combinatorially defined involution on the algebraic K–theory of the
ring spectrum associated to a bimonoidal category with anti-involution. Particular
examples of such are braided bimonoidal categories. We investigate examples such as
K(ku), K(ko) and Waldhausen’s A–theory of spaces of the form BBG, for abelian
groups G. We show that the involution agrees with the classical one for a bimonoidal
category associated to a ring and prove that it is not trivial in the above mentioned
examples.
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