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20192025
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math.AT2025

On tested Bousfield-Friedlander localizations

Niall Taggart

We demonstrate that a Bousfield-Friedlander localization with a set of test morphisms in the sense introduced by Bandklayder, Bergner, Griffiths, Johnson, and Santhanam can also be…

math.AT2022

Comparing orthogonal calculus and calculus with Reality

Niall Taggart

We show that there exists a suitable -fixed points functor from calculus with Reality to the orthogonal calculus of Weiss which recovers orthogonal calculus ``up to a shift''…

math.AT2021

The localization of orthogonal calculus with respect to homology

Niall Taggart

For a set of maps of based spaces we construct a version of Weiss' orthogonal calculus which depends only on the -local homotopy type of the functor involved. We show that $…

math.AT2020

Recovering unitary calculus from calculus with reality

Niall Taggart

By analogy with complex --theory and --theory with reality, there are theories of unitary functor calculus and unitary functor calculus with reality, both of which are genera…

math.AT2020

Unitary Functor Calculus with Reality

Niall Taggart

We construct a calculus of functors in the spirit of orthogonal calculus, which is designed to study "functors with reality" such as the Real classifying space functor, $BU_\mathbb…

math.AT2020

Comparing the orthogonal and unitary functor calculi

Niall Taggart

The orthogonal and unitary calculi give a method to study functors from the category of real or complex inner product spaces to the category of based topological spaces. We constru…