(attribution-reversal)

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]

# Day: July 19, 2020

# 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.”)

Here is the link.

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]

# a catalog of calculators

Here’s the link.

keywords:

[online calculators]

[online function-evaluators]

[online function evaluators]

[Mathematics]

[calculation]

[computation]