attribution-flipping

(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 … Continue reading attribution-flipping

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’]

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 … Continue reading sidekicks