I’m sat on a bench in Lincoln Square, Manchester, surrounded by a buzz of expectation.
The Prime Minister, Andy Burnham, is in town for his first day at Number 10 North
-- the government’s new northern base inside Heron House, immediately in front of me.
Police officers are stationed around the square, keeping watch on all the entrances.
In the middle of it all, Abraham Lincoln stands looking out across the square with the weary air of somebody who has seen it all
I’m sat on a bench in Lincoln Square, Manchester, surrounded by a buzz of expectation.
The Prime Minister, Andy Burnham, is in town for his first day at Number 10 North
-- the government’s new northern base inside Heron House, immediately in front of me.
Police officers are stationed around the square, keeping watch on all the entrances.
In the middle of it all, Abraham Lincoln stands looking out across the square with the weary air of somebody who has seen it all
…
Large mass limits of $\mathrm{G}_2$ and Calabi--Yau monopoles: calibrated concentration, Higgs zeros, and abelianization
Daniel Fadel, Goncalo Oliveira
https://arxiv.org/abs/2608.05128 https://arxiv.org/pdf/2608.05128 https://arxiv.org/html/2608.05128
arXiv:2608.05128v1 Announce Type: new
Abstract: We study large mass monopoles with structure group $\mathrm{SU}(2)$ or $\mathrm{SO}(3)$ on asymptotically conical $\mathrm{G}_2$-manifolds and Calabi--Yau $3$-folds, with fixed asymptotic class. After placing the AC asymptotic theory, the variational compactness theory of Parise--Pigati--Stern, and Li's singular abelian compactness theory in a common $\Theta$-monopole framework, we prove that the mass-renormalized Yang--Mills--Higgs and intermediate energy measures converge to $8\pi\|T\|$ for a compactly supported calibrated integral codimension-three cycle $T$. This identifies the two limiting currents and shows that the variational calibration inequalities are saturated. Using this common limit as the starting point for a finer analysis, if $\mathcal S$ is the calibrated support, $\mathcal Z$ the Kuratowski upper limit of the Higgs zero sets, and $\mathcal C$ the limiting nonabelian locus, defined as the Kuratowski upper limit of Li's curvature concentration loci, then $\mathcal S\subset\mathcal Z\subset\mathcal C=\mathcal S\cup\mathcal O$, where $\mathcal O$ is precisely the obstruction to effective codimension-three monotonicity. For the cohomogeneity-one large mass families on the Bryant--Salamon $\mathrm{G}_2$-manifolds and the Stenzel Calabi--Yau $3$-fold, we prove that $\mathcal O=\varnothing$. On $X\setminus\mathcal C$ the sequence abelianizes; corrected longitudinal curvatures converge smoothly, and the remaining compactness alternatives are governed by $L^2$-harmonic $2$-forms.
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Replaced article(s) found for math.DS. https://arxiv.org/list/math.DS/new
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