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Pontryagin: My comments concerning the worst period of his activity Some friend asked me about Pontryagin and sent me a letter about his activity published in the West in the late 1970s. He
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Document Date: 2012-01-18 08:14:38
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Pontryagin: My comments concerning the worst period of his activity Some friend asked me about Pontryagin and sent me a letter about his activity published in the West in the late 1970s. He