EntityQ853067· pop 33· linked from 83 articlesPell's equationSign in to savemathematical equation, specifically a kind of Diophantine equationConnectionsOn-Line Encyclopedia of Integer SequencesEntityArchimedes' cattle problemEntityquadratic fieldEntityIndiaCountryGreeceCountryNew York CityCityArchimedesEntityPythagorasEntityLeonhard EulerEntityInternational Standard Book NumberEntitynatural numberEntityprime numberEntityintegerEntityrational numberEntityBrahmaguptaEntityPierre de FermatEntityEratosthenesEntitydigital object identifierEntityJoseph-Louis LagrangeEntityInternational Standard Serial NumberEntityCategoriesContinued fractionsDiophantine equations