EntityQ937750· pop 20· linked from 59 articles∇Sign in to savesymbol used in mathematics, physics and engineering to indicate a differential operator in a Cartesian vector spaceConnectionsPeter Guthrie TaitEntityNévelEntityHebrewEntitycomputer scienceEntityHTMLEntityIrelandEntityJames Clerk MaxwellEntityUnicodeEntityharpEntityWilliam Thomson, 1st Baron KelvinEntitydeltaEntitydecimalEntityLaTeXEntityOxford English DictionaryEntityInternet ArchiveEntityaerodynamicsEntityWilliam Rowan HamiltonEntityCartesian coordinate systemEntityJosiah Willard GibbsEntityquaternionEntityCategoriesDifferential operatorsMathematical symbolsWilliam Rowan Hamilton