this post was submitted on 12 Jul 2025
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Today I Learned (TIL)

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You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.

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The original was posted on /r/todayilearned by /u/CalabiYauFan on 2025-07-12 15:39:09+00:00.

Original Title: TIL about "John Rainwater", a fake graduate math student in the 1950s created as a prank due to an extra student registration form. The name later became a pseudonym for publishers in functional analysis, even having their own result called "Rainwater's theorem"

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