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May
19
Two embedded smooth surfaces in a 4-manifold are an exotic pair if they are topologically, but not smoothly, isotopic A subtle point is that such surfaces might be still equivalent, i.e., related by a diffeomorphism. The first examples of this phenomenon are due to Baraglia (2024), using…
May
19
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May
20
"Some consequences of the Riemann hypothesis for varieties over finite fields" by Katz-Messing
May
26
May
27
[BO, section 8] + examples.
May
27
May
28