English

Higher Galois for Segal Topos and Natural Phenomena

Algebraic Geometry 2020-12-01 v3 Mathematical Physics math.MP

Abstract

Toen and Vezzosi showed that RHomgeom(T,lX)RHom^{geom}(T,lX) is a Segal groupoid, for TT a Segal topos, lX=Loc(X)lX = Loc(X) the Segal category of locally constant stacks on a CW complex XX. Taking the realization of such a groupoid defines a pro-object HT=RHomgeom(T,)H_T = |RHom^{geom}(T, -)| that is defined to be the homotopy shape of the topos TT. What we do instead is fix a Segal topos XX, we let TT vary, and use the fact that RHomLex(X,T)=RHomgeom(T,X)RHom^*_{Lex}(X,T) = RHom^{geom}(T,X) is a fundamental \infty-groupoid. We then prove that XX is a localization of the Segal category of local systems on RHomgeom(T,X)RHom^{geom}(T,X), in the spirit of Hoyois' work in his "Higher Galois Theory" paper, where it is proved, morally, that local systems on HTH_T are equivalent to TT itself. We provide one application of this formalism, regarding the Segal topos X=dSt(k)X=dSt(k) of derived stacks, for kk a commutative ring, as corresponding to manifestations of natural laws, themselves modeled by simplicial algebras, objects of skCAlgsk-CAlg.

Keywords

Cite

@article{arxiv.1607.00940,
  title  = {Higher Galois for Segal Topos and Natural Phenomena},
  author = {Renaud Gauthier},
  journal= {arXiv preprint arXiv:1607.00940},
  year   = {2020}
}

Comments

16 pages. Comments added, graphs simplified, proofs of Thm 3.1 and 3.2 rewritten, with lemmas. Emphasis is put on a dual adjunction in those proofs. Functoriality of this adjunction in $T$ is incorrect. It's removed in favor of a universal map, without altering the rest of the paper. Statements about the localization of $\mathcal{X}$ generalized to the setting of perceptions throughout