Posts 2023-01-16 Derangements, Dobiński's formula, and their combination 2023-01-16 Methods for factoring numbers, in the Gaṇita-kaumudī of Nārāyaṇa Paṇḍita 2022-05-24 The harmonic series, the "prime harmonic series", and their difference 2021-02-20 Huffman versus top-down coding 2020-09-12 Manually adding an OCR layer to scanned PDF 2020-08-14 Solving the set cover problem: an example 2020-06-14 A sequence of integer fractions 2020-01-26 Producing a "program trace" using GDB and Python 2020-01-15 Knuth's programming and problem-solving seminars 2019-12-27 Jon Bentley's "Programming Pearls" columns, and Van Wyk's "Literate Programming" columns in the CACM 2019-12-07 The Letter-Box (La boîte aux lettres) by René Bazin 2019-10-20 Another blurry image puzzle 2019-10-04 Breaking pills 2019-09-30 History of Indian mathematics: IIT Gandhinagar (2017) 2019-09-30 The poem in the notepaper used for “Here Comes The Sun”