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MATHEMATICA GUIDE
Variant Letters
In catering to the fine points of mathematical typesetting and notational clarity, Mathematica provides a variety of special variant forms of letters.
Reference
Mathematica Notation and Doubled Letters
\[ImaginaryI] — special form of 
representing 
(entered as EsciiEsc)
\[ConstantC] ▪ 
\[DifferentialD] ▪ 
\[ExponentialE] ▪ 
\[ImaginaryJ]
\[DoubledGamma] ▪ 
\[DoubledPi]
Special Letter-Based Forms
µ \[Micro] ▪ 
\[Angstrom] ▪ 
\[HBar] ▪ 
\[WeierstrassP]
Variant Greek Letters
\[CurlyEpsilon] ▪ 
\[CurlyTheta] ▪ 
\[CurlyKappa] ▪ 
\[CurlyPi] ▪ 
\[CurlyRho] ▪ 
\[FinalSigma] ▪ 
\[CurlyPhi] ▪ 
\[CurlyCapitalUpsilon]
Dotless Letters
\[DotlessI] — dotless i, used for unit vectors with hats, etc.
