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8:51 AM
is the first user for whom a separate tag was created.
Just kidding! ;-)
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Q: Is my joke offensive?

Przemysław ScherwentkeMy answer to the question Why is "mathematical induction" called "mathematical"? was immediately removed. It is intentionally a joke and that seems to be obvious. The reason of closing I can deduce is that my joke was offensive. Was it?

Behaviour, rented rooms in foreign places
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9:50 AM
On the other hand, I am surprised that I did not find tag on some site. (Meta.SO or main meta.)
On MO there is a user-specific tag called ask-johnson. It seems to be mainly about Banach spaces.
William Buhmann Johnson (born December 5, 1944) is an American mathematician, one of the namesakes of the Johnson–Lindenstrauss lemma. He is Distinguished Professor and A.G. & M.E. Owen Chair of Mathematics at Texas A&M University. His research specialties include the theory of Banach spaces, nonlinear functional analysis, and probability theory. He was born in Palo Alto, California and raised from an early age in Dallas, Texas. Johnson graduated from Southern Methodist University in 1966, and earned a doctorate from Iowa State University in 1969 under the supervision of James A. Dyer. After faculty...
There is also a tag called ask-noam, but I did not find anybody called Noam among the answerers. It seems to be for Noam Elkies:
Maybe we need a Noam Elkies tag as well? :-) — Todd Trimble ♦ Dec 4 '12 at 19:27
Noam David Elkies (born August 25, 1966) is an American mathematician and chess master. In 1981, at age 14, Elkies was awarded a gold medal at the 22nd International Mathematical Olympiad, receiving a perfect score of 42 and becoming one of just 26 participants to attain this score, and the youngest ever to do so. Elkies graduated from Stuyvesant High School in 1982 and went on to Columbia University, where he won the Putnam competition at the age of sixteen years and four months, making him one of the youngest Putnam Fellows in history. He was a Putnam Fellow two more times during his undergraduate...
 

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