Twisted Cohomotopy implies M5-brane anomaly cancellation

H Sati, U Schreiber - Letters in Mathematical Physics, 2021 - Springer
We highlight what seems to be a remaining subtlety in the argument for the cancellation of
the total anomaly associated with the M5-brane in M-theory. Then, we prove that this subtlety …

Short time existence of the heat flow for Dirac-harmonic maps on closed manifolds

J Wittmann - Calculus of Variations and Partial Differential …, 2017 - Springer
The heat flow for Dirac-harmonic maps on Riemannian spin manifolds is a modification of
the classical heat flow for harmonic maps by coupling it to a spinor. It was introduced by …

A universal spinor bundle and the Einstein–Dirac–Maxwell equation as a variational theory

O Müller, N Nowaczyk - Letters in Mathematical Physics, 2017 - Springer
Not only the Dirac operator, but also the spinor bundle of a pseudo-Riemannian manifold
depends on the underlying metric. This leads to technical difficulties in the study of problems …

[PDF][PDF] The Yamabe problem

M Paschalis - 2023 - pergamos.lib.uoa.gr
Let M be a smooth manifold and let g, g be Riemannian metrics on M. The metric g is said to
be conformal to g if there exists a smooth positive function u∈ C∞+(M) such that g= ug. This …

Existence of Dirac eigenvalues of higher multiplicity

N Nowaczyk - Mathematische Zeitschrift, 2016 - Springer
In this article, we prove that on any compact spin manifold of dimension m ≡ 0, 6, 7\mod 8
m≡ 0, 6, 7 mod 8, there exists a metric, for which the associated Dirac operator has at least …

The heat flow for Dirac-harmonic maps

J Wittmann - 2018 - epub.uni-regensburg.de
The main result of Chapter 1 is short time existence of the heat flow for Dirac-harmonic maps
on closed manifolds. Dirac-harmonic maps are the critical points of a functional motivated by …