http://66george.livejournal.com/ ([identity profile] 66george.livejournal.com) wrote in [personal profile] juan_gandhi 2015-05-19 08:20 pm (UTC)

Дан объект D. Есть функтор умножения на D (_xD) и функтор возведения в степень D (_^D). Если D изоморфно D^D, то эти функторы коммутируют! Выведите из этого много разных чудес немедленно.
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