Algebraic Theories and (Infinity,1)-Categories

Details Algebraic Theories and (Infinity,1)-Categories Algebraic Theories and (Infinity,1)-Categories

2010-11-14

arxiv.org/abs/1011.3243v1

Mathematics

Algebraic Topology

112 pages, 1 figure; PhD thesis (University of Sheffield)

Scientific paper

We adapt the classical framework of algebraic theories to work in the setting of (infinity,1)-categories developed by Joyal and Lurie. This gives a suitable approach for describing highly structured objects from homotopy theory. A central example, treated at length, is the theory of E_infinity spaces: this has a tidy combinatorial description in terms of span diagrams of finite sets. We introduce a theory of distributive laws, allowing us to describe objects with two distributing E_infinity stuctures. From this we produce a theory of E_infinity ring spaces. We also study grouplike objects, and produce theories modelling infinite loop spaces (or connective spectra), and infinite loop spaces with coherent multiplicative structure (or connective ring spectra). We use this to construct the units of a grouplike E_infinity ring space in a natural manner. Lastly we provide a speculative pleasant description of the K-theory of monoidal quasicategories and quasicategories with ring-like structures.

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