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She paints faces of children at the circus. She wanted to paint my face. I told her it would be a difficult job with all the creases. She had a big smile for that (don't know if she really understood).73 views
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Ivan Georgievich Petrovsky (also Petrovskii), a Soviet mathematician in the field of partial differential equations. He greatly contributed to solution of Hilbert's 19th and 16th problems.73 views
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