nLab
discrete group

Context

Cohesive \infty-Toposes

cohesive topos

cohesive (∞,1)-topos

cohesive homotopy type theory

Backround

Definition

Presentation over a site

Structures in a cohesive (,1)(\infty,1)-topos

structures in a cohesive (∞,1)-topos

Structures with infinitesimal cohesion

infinitesimal cohesion?

Models

Contents

Idea

A discrete group is a group object in discrete spaces.

Equivalently this is just an ordinary group – a set with a group structure. One says discrete group for emphasis in a context where by default one is speaking about topological groups or Lie groups or groups equipped with other structure. See discrete ∞-groupoid for more discussion.

Revised on January 14, 2011 08:11:37 by Urs Schreiber (82.113.99.18)