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PartialD \[PartialD]

FilledSmallSquare Alias: AliasIndicatorpdAliasIndicator.

FilledSmallSquare Prefix operator with built-in evaluation rules.

FilledSmallSquare is by default interpreted as D[y, x].

FilledSmallSquare is used in mathematics to indicate boundary.

FilledSmallSquareAliasIndicatordAliasIndicator gives \[Delta], not \[PartialD].

FilledSmallSquare You can use \[InvisibleComma] in the subscript to to give several variables without having them separated by visible commas.

FilledSmallSquare See The Mathematica Book: Section 1.10.4, Section 1.10.4, Section 3.10.3 and Section 3.10.4.

FilledSmallSquare See also: \[Delta] , \[Del] , \[DifferentialD] , \[Eth] .