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 likely counting formulae regarding those geometries have attention-grabbing guises while one shall we the dimensions of the sector visit 1. nevertheless, 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 application, which goals at fixing the classical Riemann Hypothesis.

This booklet, that is the 1st of its type within the F1
-world, covers numerous parts in F1

-theory, and is split into 4 major elements – Combinatorial idea, 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 other scheme theories over F1

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

Each bankruptcy is thoroughly written by means of specialists, and in addition to 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 sphere with one aspect, may still allure any mathematician, despite speciality.

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

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Example text

57) Here, again, one does not initially ask γ to be faithful, so that it could be that we describe G/ker(γ), rather than G, as a group inside Sym(X). 2. Representations over F1 . There are reasons to think that both approaches should have similar properties—after all, we are trying to describe the same object in different guises. When one is looking for linear representations of a group, one has to fix the field over which the vector space is defined, as well as the dimension of the vector space.

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.

We say that 41 Belian categories C contains enough injectives, if for every object X there exists a monomorphism X → I for some injective object I. An object is called projective, if it is injective in the opposite category C opp where all arrows are reversed. This means that P is projective if for every epimorphism ψ : A B the induced map Hom(P, A) → Hom(P, B) is surjective. We say that C has enough projectives, if C opp has enough injectives. This means that for every object X there exists an epimorphism P X, where P is projective.

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