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arXiv · 2505.22376

Functoriality of the Klein-Williams Invariant and Universality Theory

Başak Küçük
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Abstract

Both the Klein-Williams invariant $\ell_G(f)$ from \cite{KW2} and the generalized equivariant Lefschetz invariant $\lambda_G(f)$ from \cite{weber07} serve as complete obstructions to the fixed point problem in the equivariant setting. The latter is functorial in the sense of Definition \ref{functorial}. The first part of this paper aims to demonstrate that $\ell_G(f)$ is also functorial. The second part summarizes the ``universality" theory of such functorial invariants, developed in \cites{lueck1999, Weber06}, and explicitly computes the group in which the universal invariant lies, under a certain hypothesis. The final part explores the relationship between $\ell_G(f)$ and $\lambda_G(f)$, and presents examples to compare $\ell_G(f)$, $\lambda_G(f)$, and the universal invariant.

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Başak Küçük. 2025-05-28. Functoriality of the Klein-Williams Invariant and Universality Theory. https://arxiv.org/abs/2505.22376

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