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# Questions

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5
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211
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### A matrix inequality involving the Hilbert-Schmidt norm

dec 10 at 16:57 Denis Serre 18.7k13193

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3
125
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### Stability of the spectrum for perturbations of the boundary

jul 20 at 23:46 marrocos 111

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4
879
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### A question on the integral of Hilbert valued functions

jun 8 11 at 13:30 Pietro Majer 19.7k12469

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489
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### Does a quantitative version of Fredholm theory exist?

aug 24 11 at 18:17 jjcale 70315

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1k
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### Trapped rays bouncing between two convex bodies

dec 11 11 at 0:23 Joseph O'Rourke 43.3k149214

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416
views

### A puzzling question on real interpolation

jul 4 10 at 11:17 Willie Wong 6,9872043

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