4 papers
math.FA2023
The Cotlar-Stein Lemma, Grothendiecks Inequality and All That
Brian Jefferies
The purpose of this paper is point out connections between scattering theory, double operator integrals, Kreins spectral shift function, integration theory, bimeasures, Feynman pat…
math.GM2023
Topological QFT
Brian Jefferies
An earlier paper gave a means of calculating the Lamb shift via Feynman diagrams. Here we apply the same techniques to TQFT.
math.CV2023
Holomorphic functions on the lie ball and their monogenic counterparts
Brian Jefferies
The Cauchy integral formula in Clifford analysis allows us to associate a holomorphic function $\tilde f:L_n\to \C$ on the Lie ball in $\C^n$ with its monogenic counterpart $…
math.FA2021
Kippenhahn Varieties and the Weyl Calculus for Several Matrices I
Brian Jefferies
The paper reviews properties of the Weyl functional calculus for several operators and its relation to the generalised numerical range of hermitian matrices. The support and si…