Александр Иванов: Спасибо, любимый Питер! Спасибо всем, кто смог прийти в Jagger!
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![Слабое место математики: можно ли доказать всё, что истинно? [Veritasium]](https://sun9-64.userapi.com/yL_MsAVbX04SasVJkkNeQTj2o3O_Bm-syOaQpA/LPKIaETg_vI.jpg)
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