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On Tate’s trace. (English) Zbl 1130.15001

Let \(V\) be a vector space over a given field. An endomorphism \(\varphi\) of \(V\) is finite potent if \(\varphi^m(V)\) is finite dimensional, for some positive integer \(m\). J. Tate [Ann. Sci. Éc. Norm. Supér. (4) 1, No. 1, 149–159 (1968; Zbl 0159.22702)] extended the traditional definition of trace, including any underlined vector space, provided the given endomorphism is finite potent. The problem of whether the Tate’s trace is linear remains open.
In this paper, a new approach to this problem is provided and it is shown that if a counterexample to linearity exists at all, it must be of a special type.

MSC:

15A04 Linear transformations, semilinear transformations
15A03 Vector spaces, linear dependence, rank, lineability

Citations:

Zbl 0159.22702
Full Text: DOI

References:

[1] Pablos Romo F, Linear Multilinear Algebra
[2] Tate J., Annales Scientifiques de l’Ecole Normale Superieure Series 4 1 pp 149– (1968)
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