Quotable maths: Turing Sep 27, 2012 A selection of other posts Apr 1, 2020 Ask Uncle Colin: Remainders Feb 22, 2017 Ask Uncle Colin: Trigonometric inverses and picking the correct quadrant Jan 7, 2013 Remembering how to differentiate - Secrets of the Mathematical Ninja Mar 5, 2012 Uswitch, units and unitwit subscribe via RSS