Finite syntomic topology and algebraic cobordism of non-unital algebras (2203.05331v4)

Abstract: Elmanto, Hoyois, Khan, Sosnilo, and Yakerson invented that the algebraic cobordism is the sphere spectrum of the $\mathbb{P}^1_+$-stable homotopy category of framed motivic spectra with finite syntomic correspondence. Inspired by their works and Dwyer--Kan's hammock localization, we consider the localization of the stable $\infty$-category of motivic spectra by zero-section stable finite syntomic surjective morphisms. This paper results that the localization functor is $\mathbb{A}^1$-homotopy equivalent to the finite syntomic hyper-sheafification, and the algebraic cobordism is weakly equivalent to the motivic sphere spectrum after the localization (or the hyper-sheafification). Furthermore, on the finite syntomic topology, we prove the tilting equivalence between the algebraic cobordisms for non-unital integral perfectoid algebras.