Absolute Arithmetic and F1-geometry by Koen Thas

By Koen Thas

It's been identified for it slow that geometries over finite fields, their automorphism teams and sure counting formulae regarding those geometries have attention-grabbing guises whilst one shall we the dimensions of the sphere visit 1. nonetheless, the nonexistent box with one point, F1

, provides itself as a ghost candidate for an absolute foundation in Algebraic Geometry to accomplish the Deninger–Manin software, which goals at fixing the classical Riemann Hypothesis.

This e-book, that's the 1st of its sort within the F1
-world, covers a number of parts in F1

-theory, and is split into 4 major components – Combinatorial thought, Homological Algebra, Algebraic Geometry and Absolute Arithmetic.

Topics handled comprise the combinatorial concept and geometry in the back of F1
, specific foundations, the combination of alternative scheme theories over F1

which are shortly to be had, causes and zeta capabilities, the Habiro topology, Witt vectors and overall positivity, moduli operads, and on the finish, even a few arithmetic.

Each bankruptcy is punctiliously written by way of specialists, and along with elaborating on identified effects, fresh effects, open difficulties and conjectures also are met alongside the way.

The range of the contents, including the secret surrounding the sector with one point, may still allure any mathematician, despite speciality.

Keywords: the sector with one aspect, F1
-geometry, combinatorial F1-geometry, non-additive type, Deitmar scheme, graph, monoid, cause, zeta functionality, automorphism workforce, blueprint, Euler attribute, K-theory, Grassmannian, Witt ring, noncommutative geometry, Witt vector, overall positivity, moduli house of curves, operad, torificiation, Absolute mathematics, counting functionality, Weil conjectures, Riemann speculation

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55) On the other hand, multiplication by a is a linear automorphism A on the F1n vector space Fq and hence we can look at its determinant det(A). 1. The power residue symbol equals det(A). 28 Koen Thas 5. Group representations In a recent communication [13], Javier L´opez Pe˜ na observed that the classical set-theoretical approach to representation theory of groups can be seen as a degenerate case of the general theory of linear representations through elementary F1 -theory, giving some common ground that explains the similarities between these two theories.

39 . 39 . 40 . 48 . 53 . 54 . 62 . 65 . 67 . . . . . . 70 . 70 . 72 . 75 . 76 References . . . . . . . . . . . . . . . . . . . 77 Index . . . . . . . . . . . . . . . . . . . . 79 1. 1. Introduction. The ultimate goal of F1 -geometry is to extend the classical correspondence between function fields and number fields so as to allow transfer of algebro-geometric methods to the number field case and thus make it possible to attack deep number theoretical problems.

This representation is of course not faithful, and inside GLn (F1n ) the elements ρ(σi ), i = 1, 2, . . , n − 1, generate a subgroup isomorphic to Sn . The linearity of braid groups over “true fields” was only quite recently obtained independently by Bigelow [2] and Krammer [11], and provided the solution of a major open problem. Note that any faithful linear representation ρ : Bn −→ GLm (R) (70) with m ≥ 1 ∈ N and R an “F1 -ring” (see the author’s second chapter) which is embeddable in a field or in a division ring K would give a faithful linear representation over K.

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