Русский: Иллюстрация к теореме об уголках из аддитивной комбинаторике - подмножество квадрата {1,...,6]^2 плотности 0.5, содержащее ровно два уголка, выделенных синим и зелёным цветами
English: Illustration two corners from corners theorem - subset of {1,...,6]^2 with density 0.5, which contains two corners (green and blue)
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