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SU(2)² -invariant G₂ -instantons

Lotay, JD; Oliveira, G; (2018) SU(2)² -invariant G₂ -instantons. Mathematische Annalen , 371 (1-2) pp. 961-1011. 10.1007/s00208-017-1636-x. Green open access

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Abstract

We initiate the systematic study of G₂-instantons with SU(2)² -symmetry. As well as developing foundational theory, we give existence, non-existence and classification results for these instantons. We particularly focus on R⁴ x S³ with its two explicitly known distinct holonomy G₂ metrics, which have different volume growths at infinity, exhibiting the different behaviour of instantons in these settings. We alsogive an explicit example of sequences of G₂-instantons where “bubbling” and “removable singularity” phenomena occur in the limit.

Type: Article
Title: SU(2)² -invariant G₂ -instantons
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s00208-017-1636-x
Publisher version: https://doi.org/10.1007/s00208-017-1636-x
Language: English
Additional information: © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics
URI: https://discovery.ucl.ac.uk/id/eprint/1550203
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