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Re: [Coq-Club] [ERRATA] Postdoc position annoucement


Chronological Thread 
  • From: CHRISTOPHER MARY <OOO1337777 AT outlook.com>
  • To: Vasily Pestun <pestun AT ihes.fr>, "cartier AT ihes.fr" <cartier AT ihes.fr>, "coq-club AT inria.fr" <coq-club AT inria.fr>
  • Cc: "application AT ihes.fr" <application AT ihes.fr>
  • Subject: Re: [Coq-Club] [ERRATA] Postdoc position annoucement
  • Date: Wed, 16 Jun 2021 11:26:28 +0000
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... indeed as I promised
Appendix: What is the minimal example of sheaf cohomology? Grammatically
Short: Hold any Dosen-style cut-elimination confluence of arrow-terms (for
some comonad, or pairing-product, or 2-category, or proof-net star-autonomous
category,... ), and form the (petit) grammatical-globular site (double
category) whose objects are the arrow-terms and where any (necessarily
finite) covering family of morphisms is either any reduction-conversion
linkage or all the (immediate proper, including unit-arrows in cuts) subterms
of some redex arrow-term. Define any model (in Set) to be some grammatical
sheaf (hence globular copresheaf) of (span of) sets over this site, where
each covering family become limit cone (constructively, using compatible
families). Now starting with some generative presheaf data, then
sheafification-restricted-below-any-sieve of this presheaf can be inductively
constructed by refinements of the sieves. Moreover, it may be assumed some
generating cocontinuous adjunction of sites; the result is some
dependent-constructive-computational-logic of geometric dataobjects
(including homotopy-types): MODOS. Now globular homology of any copresheaf
computes the composable occurrences of arrow-terms (cycles from 0 to 1). Also
grammatical cohomology of the sheafification (graded by the nerve of its
sieve argument) computes the global solutions of occurrences of all
arrow-terms in the model which satisfy the confluence of reductions in the
site. Contrast to the covariant sketch models of some coherent theory; but
now any globular-covariant (contravariant finite-limit sketch) concrete model
is some category with operations on arrows. The sense mimicks the usual
Kripke-Joyal sense, as explicit definitions. The generic model
contravariantly sends any object G to the covariant diagram of sets
represented by the sheafified G over only the finitely-presentable (data)
sheaf-models: G ↦ Hom(sheafified(Hom(–, G)), fpModelsSet(_)) … and further
could be sliced over any (outer/fixed) dataobject.

(1.) Morphisms: the shape of the point is now “A” instead of singleton,
context extension is polymorph…
for (B over Delta) and for variable (Theta), then
Span(Theta ~> (Delta;B)) :<=> Hom( (x: Gamma; a: A( h(x) )) ~> B( f(x) ) )
with some (f: Gamma -> Delta) and (h: Gamma -> Theta) and (A over Theta)

ERRATA: (2.) Algebraic-geometric dataobjects: the elimination schema for the
dataobjects gives the base of the construction for the sheafification;
continued with the refinements/gluing schema below any sieve...

| Constructing : asConstructor F U f
______________________________________
Hom( Restrict U VV ~> Restrict F VV ))

| Destructing : (forall U (f : F U) (cons_f : asConstructor F U f),
Hom( Restrict U VV ~> E ))
___________________________________________________________________
Hom( Restrict F VV ~> Sheafified E VV )

| Refining : (forall W (v : Site( W ~> V | in sieve VV )),
Hom( Restrict F WW_v ~> Sheafified E WW_v ))
____________________________________________________________________
Hom( Restrict F WW_VV ~> Sheafified E WW_VV )

Lemma: cut-elimination holds. Corollary: grammatical sheaf cohomology exists.

Applications: with 2-category sites, get some constructive homotopy types;
with proof-net star-autonomous categories sites, get some constructive
alternative to Urs Schreiber's geometry of quantum-fields physics.

https://nicolasbourbaki365-demo.workschool365.com
( https://github.com/1337777/cartier/blob/master/cartierSolution0.v )

-----

La République de Christopher

<bourbaki> alors, as tu résolu la faim dans le monde avec ton machin là?
<chris.> donc l'étalon pour moi c'est de résoudre la faim dans le monde? je
ne peux pas aussi faire des «mathématiques de maintenance» médiocres comme
tout le monde?
<bourbaki> non
<chris.> et c'est sans appel? le tribunal ne pouvant directement réviser une
juridiction académique, je vais donc contourner et demander au tribunal le
statut moi-même de décideur académique
<bourbaki> mais c'est ridicule
<chris.> exactement! ridicule par rapport à qui, à quoi, à quel
retranscriptions et reçus de faits? il faudra bien un compte rendu et
réexamen public pour comparer à quel point cela est ridicule... ou pas
<bourbaki> beaucoup de gens n'y voient aucun problème
<chris.> ce n'est pas beaucoup d'individus. c'est une interdépendance
synchronisée qui s'auto-signent des chèques en blanc débiteurs du trésor
public, basés sur des devises monétaires falsifiées et intoxiquées; où toute
tentative de marketing et vente directe au grand public est considérée comme
"arrogance" ou "spam". comme-ci j'avais osé compter des morphismes au lieu de
compter des bananes; ils m'ont pris pour le petit Kirikou ou quoi. ah, voilà!
le fameux «ils», mais je ne nommerai pas des «communautés qu'on ne peut pas
nommer» ...
<bourbaki> je ne savais pas que t’étais un Soralien
<chris.> mon combat ou action directe, si je puis me permettre ces
expressions, ne s'arrête pas là. au péril d'être classé fiche S par les
Services, j'irais même jusqu'à dire que dans l'absolu, un braqueur de banque
est plus respectable. lui au moins il est «cash». pas d'embrouilles et
diarrhées mentales pour inverser la réalité
<bourbaki> qu'est ce qui est réel? le statu quo crée une réalité. tu n'as pas
dû lire la Caverne de Platon... vas-y abrège
<chris.> ReadMyReply.com


  • Re: [Coq-Club] [ERRATA] Postdoc position annoucement, CHRISTOPHER MARY, 06/16/2021

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