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- W2963544055 abstract "The harmonic map heat flow is a geometric flow well known to produce solutions whose gradient blows up in finite time. A popular model for investigating the blow-up is the heat flow for maps $mathbb R^{d}to S^{d}$, restricted to equivariant maps. This model displays a variety of possible blow-up mechanisms, examples include self-similar solutions for $3le dle 6$ and a so-called Type II blow-up in the critical dimension $d=2$. Here we present the first constructive example of Type II blow-up in higher dimensions: for each $dge7$ we construct a countable family of Type II solutions, each characterized by a different blow-up rate. We study the mechanism behind the formation of these singular solutions and we relate the blow-up to eigenvalues associated to linearization of the harmonic map heat flow around the equatorial map. Some of the solutions constructed by us were already observed numerically." @default.
- W2963544055 created "2019-07-30" @default.
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- W2963544055 date "2017-06-22" @default.
- W2963544055 modified "2023-10-13" @default.
- W2963544055 title "Type II Blow-up Mechanism for Supercritical Harmonic Map Heat Flow" @default.
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- W2963544055 doi "https://doi.org/10.1093/imrn/rnx122" @default.
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