#Numbertheory
Lagrange’s four-square theorem asserts that any positive whole number can be written as the sum of four squares of integers. Leave an example in the comments!

#MathType #NumberTheory #math #mathematics #mathproblems #mathfacts
November 3, 2025 at 10:00 AM
"The Early (and Peculiar) History of the Möbius Function" by William Dunham is a highly entertaining and accessible article. Full of suprises. Glad I found it at Internet Archive:

web.archive.org/web/20230127...

#Mathematics #NumberTheory #MathHistory
web.archive.org
March 10, 2025 at 4:23 AM
1^4+7^4+9^4=8963*1^4
283^4+383^4+647^4=8963*69^4
477^4+961^4+2723^4=8963*281^4

#math #numbertheory #mathsky
April 18, 2025 at 2:43 AM
251^4+505^4+108193^2=3*405^4

4077743521777^4+6520757276675^4+32143720208637861150717697^2=3*5677768284885^4

554805603345223715^4+819458846481507601^4+579351057407300315946125174782562207^2=3*736213098121463205^4

#math #numbertheory
May 7, 2025 at 5:28 AM
13199^4+16741^4+195145599^2=83*6487^4

1623917522793822147131253224898073^4+2814487832293530369186558433214747^4+1131815380777738933208897326326959594910297530368152477707723090991^2=83*961654493602259711868859192591111^4

#math #numbertheory
May 17, 2025 at 9:09 AM
42517363814957927782360687722949934251614682303^4+68622088140022322840320747337772864730788840359^4+6060614754396580693525114725105553587711713024782308477772985408897685534368493626095042320289^2=83*29419266693965360458945085751367799730636226587^4

#math #numbertheory
May 17, 2025 at 7:44 AM
488555115955237238523103559704269301054788872521^4+1400780285734288514634283408422272146918517407607^4+7347914626835931553421439501628550869003878023839655160566838365633066835720052959433170594291191^2=3*2095981461249317632408976167765381918845386654517^4

#math #numbertheory
May 27, 2025 at 4:15 AM
188728247408785981^4+363071274626474627^4+557547433723127906^4=498*15214581798738838870724966500405361^2

#math #numbertheory
June 18, 2025 at 8:23 AM
23032560254161468263651343574463881828748763481366^4+44964680562223080539008277333797730330495077742551^4+99691455945734601251622426178790220462483246641750^4=177*763358322067721190811333494791392919418183184066726233004373932058562774706673343943196621993734441^2

#nath #numbertheory
June 15, 2025 at 10:38 PM