Monthly Archives: April 2009
Matrix Decomposition by Discrete Fourier Transform
Given a 3-vector of complex numbers, (A,B,C), define its discrete Fourier transform as where . That is, I’ll use lower case letters to denote the discrete Fourier transforms of UPPER case letters. The above leaves off a factor of but … Continue reading
Filed under particle physics, physics
An Immorality Tale
She was born with given name Johanna Maria Magdalena and a last name of either Behrend or Ritschel, my sources disagree. Her parents were unmarried, did she receive the last name of her father, Oskar Ritschel, or her mother, Auguste Behrend? In either case it was November 11, 1901. She was one of the most fascinating personalities of her time. Continue reading
Filed under book review, History
