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Gao Chen, Shi-type estimates and finite time singularities of flows of G2 structures, The Quarterly Journal of Mathematics, Volume 69, Issue 3, September 2018, Pages 779–797, https://doi.org/10.1093/qmath/hax060
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Abstract
In this paper, we extend Lotay–Wei’s Shi-type estimate from Laplacian flow to more general flows of G2 structures including the modified Laplacian co-flow. Then we prove a version of κ-non-collapsing theorem. We will use both of them to study finite-time singularities of general flows of G2 structures.
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