example 1: ‘the thin man’ (originally referred to the murder victim, but later to the detective who solved the case)
example 2: “Any man that hates dogs and babies can’t be all bad.” (said OF W.C. Fields, but later attributed TO him.)
example 3: the protector in ‘To Kill a Mockingbird’
example 4: Richard Cory
keywords:
[flip-flop]
[reversal]
[opposite]
[attribute-flipping]
[attribute-reversal]

# QR algorithm

(Despite the name, no QR decompositions are explicitly performed.)
Here’s the link to the Wikipedia article on this topic.
keywords:
[Mathematics]
[ironic name]
[matrix]
[matrices]
[eigenvalue algorithm]
[eigenvalues of a matrix]
[Numerical Linear Algebra]
[orthogonal matrix]
[upper triangular matrix]
[multiply factors in reverse order]
[multiplying factors in reverse order]
[iteration]
[repetition]
[‘rinse and repeat’]

# a catalog of smart replies

(for example: “Did you graduate from Harvard?” – “No, but my secretary did.”)
keywords:
[Language Arts]
[Linguistics]
[wit]

# sidekicks

(suggested new terminology)
For all powers of 2, w, call the smallest (2^n)*3 > w, for n >= 0, the sidekick of w, and denote it by s(w). Then the following 4 facts are easily proved:
(1) for each n >= 1, s(2^n) = (3/2)*(2^n) (and therefore (because of the 3/2 factor), as noted by Melvin Peralta and Miriam Ong Ante for OEIS sequence A007283, the sidekicks constitute the average of consecutive powers of 2, starting with 2^1);
(2) for n > 1, s(2^n) is the one and only number strictly between 2^n and 2^(n+1) whose
bigomega value is equal to the bigomega value of (2^n);
(3) for n > 1, like both 2^n and 2^(n+1), s(2^n) is the smallest number having its prime signature;
(4) for n > 1, phi(s(2^n)) = phi(2^n).
keywords:
[Mathematics]
[Number Theory]