\[ConstantC] (Mathematica Character Name)

Unicode: F7DA. Alias: Esc cc Esc.

\[ContourIntegral] (Mathematica Character Name)

Unicode: 222E. Alias: Esc cint Esc. Compound operator. ∮ f x is by default interpreted as ContourIntegral[f,x].

\[Copyright] (Mathematica Character Name)

Unicode: 00A9. Letter-like form.

\[CounterClockwiseContourIntegral] (Mathematica Character Name)

Unicode: 2233. Alias: Esc cccint Esc. Compound operator. ∳ f x is by default interpreted as CounterClockwiseContourIntegral[f,x].

\[Cup] (Mathematica Character Name)

Unicode: 2323. Infix operator. x ⌣ y is by default interpreted as Cup[x,y]. Used in pure mathematics to mean cup product.

\[CurlyCapitalUpsilon] (Mathematica Character Name)

Unicode: 03D2. Aliases: Esc cU Esc, Esc cUpsilon Esc. Greek letter. Not commonly used. Used in astronomy for mass to light ratio.

\[CurlyKappa] (Mathematica Character Name)

Unicode: 03F0. Aliases: Esc ck Esc, Esc ckappa Esc. Greek letter.

\[CurlyPi] (Mathematica Character Name)

Unicode: 03D6. Aliases: Esc cp Esc, Esc cpi Esc. Greek letter. Not commonly used, except in astronomy.

\[CurlyRho] (Mathematica Character Name)

Unicode: 03F1. Aliases: Esc cr Esc, Esc crho Esc. Greek letter.

\[Dash] (Mathematica Character Name)

Unicode: 2013. Alias: Esc - Esc. Letter-like form.