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bookwor.ms is one of the many independent Mastodon servers you can use to participate in the fediverse.
a Mastodon instance for book lovers.
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96active users
bookwor.ms: About · Profiles directory · Privacy policy
Mastodon: About · Get the app · Keyboard shortcuts · View source code · v4.3.8
選択公理をツォルンの補題、ツェルメロの整列定理と結びつけるのは定番なんだけどね。
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