$C_2$-Equivariant Orthogonal Calculus
Fuente:
arXiv
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866912004813357056 |
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| author | Yavuz, Emel |
| author_facet | Yavuz, Emel |
| contents | In this thesis, we construct a new version of orthogonal calculus for functors $F$ from $C_2$-representations to $C_2$-spaces, where $C_2$ is the cyclic group of order 2. For example, the functor $BO(-)$, which sends a $C_2$-representation $V$ to the classifying space of its orthogonal group $BO(V)$. We obtain a bigraded sequence of approximations to $F$, called the strongly $(p,q)$-polynomial approximations $T_{p,q}F$. The bigrading arises from the bigrading on $C_2$-representations. The homotopy fibre $D_{p,q}F$ of the map from $T_{p+1,q}T_{p,q+1}F$ to $T_{p,q}F$ is such that the approximation $T_{p+1,q}T_{p,q+1}D_{p,q}F$ is equivalent to the functor $D_{p,q}F$ itself and the approximation $T_{p,q}D_{p,q}F$ is trivial. A functor with these properties is called $(p,q)$-homogeneous. Via a zig-zag of Quillen equivalences, we prove that $(p,q)$-homogeneous functors are fully determined by orthogonal spectra with a genuine action of $C_2$ and a naive action of the orthogonal group $O(p,q)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15891 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $C_2$-Equivariant Orthogonal Calculus Yavuz, Emel Algebraic Topology 55P42, 55P91, 55U35 In this thesis, we construct a new version of orthogonal calculus for functors $F$ from $C_2$-representations to $C_2$-spaces, where $C_2$ is the cyclic group of order 2. For example, the functor $BO(-)$, which sends a $C_2$-representation $V$ to the classifying space of its orthogonal group $BO(V)$. We obtain a bigraded sequence of approximations to $F$, called the strongly $(p,q)$-polynomial approximations $T_{p,q}F$. The bigrading arises from the bigrading on $C_2$-representations. The homotopy fibre $D_{p,q}F$ of the map from $T_{p+1,q}T_{p,q+1}F$ to $T_{p,q}F$ is such that the approximation $T_{p+1,q}T_{p,q+1}D_{p,q}F$ is equivalent to the functor $D_{p,q}F$ itself and the approximation $T_{p,q}D_{p,q}F$ is trivial. A functor with these properties is called $(p,q)$-homogeneous. Via a zig-zag of Quillen equivalences, we prove that $(p,q)$-homogeneous functors are fully determined by orthogonal spectra with a genuine action of $C_2$ and a naive action of the orthogonal group $O(p,q)$. |
| title | $C_2$-Equivariant Orthogonal Calculus |
| topic | Algebraic Topology 55P42, 55P91, 55U35 |
| url | https://arxiv.org/abs/2408.15891 |