Recent additions to the website of Keith Matthews

9th September 2023. Added On a diophantine equation of Nikolai Osipov.
24th May 2023. Added an exposition of G. Venturini's Theorems 3 (case k=1) and 7.
13th April 2023. Added a 6-branched mapping and associated conjecture.
4th April 2023. Added Example 4 of G. Venturini.
3rd April 2023. Added m = 71 example to http://www.numbertheory.org/php/gurbaxani.html.
31st March 2023. Added Venturini's Example 5.
15th March 2023. Combining the 5x+1 and 3x+1 mappings.
12th March 2023. bcwiggin.html.
8th March 2023. goncalves-greenfield-madrid.html.
9th March 2023. goncalves-greenfield-madrid1.html.
5th March 2023. bell_numbers.html.
1st November 2022. Belatedly added a correction to paper G. Havas, B.S. Majewski, K.R. Matthews, Extended gcd and Hermite normal form algorithms via lattice basis reduction, Experimental Mathematics, Vol 7 (1998) 125-136, supplied by Wilberd van der Kallen in February 15, 2017 in response to a question communicated to me by Benjamin Hildprecht in Jan 31, 2017.
21st December 2021. An obituary of John Malcolm Campbell.
8th August 2021. On solving a binary quadratic diophantine equation, K.R. Matthews, J.P. Robertson, Rocky Mountain Journal of Mathematics, 51(4): 1369-1385.
5th August 2021. Finding the Stolt fundamental solutions of ax² + bxy + cy² = N.
23rd July 2021. A theorem in the style of Satz 2.13, Die Lehre von den Kettenbrüchen, O. Perron.