Also, here is backup of Alexander Spartalis' 640-pages "The Mathematics Handbook", v4.1, June 2nd, 2019.[0,1,2] > However, now it appears that Alex's site no l

Also, here is backup of Alexander Spartalis' 640-pages "The Mathematics Handbook", v4.1, June 2nd, 2019.[0,1,2] > However, now it appears that Alex's site no longer exists In 2019 Alex moved to new site, which also is not availabale anymore, BUT there are backups of both sites.[0,3] JFTR, You may try contact with Alex Spartails via Facebook & Instagram.[4,5] [0] http://web.archive.org/web/20200127012510/http://mathscheats.weebly.com/2019-downloads.html http://web.archive.org/web/20200127012510/http://mathscheats... [1] https://drive.google.com/file/d/1MM2Hu5qlptkg8dNLM9QibeXHErLz73Qy/view https://drive.google.com/file/d/1MM2Hu5qlptkg8dNLM9QibeXHErL... [2] https://www.scribd.com/document/412167295/the-mathematics-handbook-v4 https://www.scribd.com/document/412167295/the-mathematics-ha... [3] http://web.archive.org/web/20190530065518/https://www.alexspartalis.com/cheat-sheet.html http://web.archive.org/web/20190530065518/https://www.alexsp... [4] https://m.facebook.com/alexspartails https://m.facebook.com/alexspartails [5] https://instagram.com/alexspartails https://instagram.com/alexspartails