Equivariant Framed 1-Manifolds and the Pontryagin-Thom Isomorphism

Abstract

The Pontryagin-Thom theorem gives an isomorphism between the cobordism group of framed $n$-dimensional manifolds, $ω_n$, and the $n^{th}$ stable homotopy group of the sphere spectrum, $π_n(\mathbb{S})$. The equivariant analogue of this theorem, gives an isomorphism between the equivariant cobordism group of $V$-framed $G$-manifolds, $ω_V^G$, and the $V^{th}$ equivariant stable homotopy group of the $G$-sphere spectrum, $π_V^G(\mathbb{S})$, for a finite group $G$ and a $G$-representation, $V$. In this paper, we explicitly identify the images of each element of $ω_1^{C_2}$ and $ω_σ^{C_2}$ in $π_1^{C_2}(\mathbb{S})$ and $π_σ^{C_2}(\mathbb{S})$ under the equivariant Pontryagin-Thom isomorphism.