Unicode: 25A1. Alias: Esc esq Esc. Letter-like form. Not the same as the operator \[Square]. Not the same as \[Placeholder].
Unicode: 03F5. Aliases: Esc e Esc, Esc epsilon Esc. Greek letter. Not the same as \[Element].
\[Eta]
(Mathematica Character Name) Unicode: 03B7. Aliases: Esc et Esc, Esc eta Esc, Esc h Esc. Greek letter. Used in TraditionalForm for DedekindEta.
Unicode: 25A0. Alias: Esc fsq Esc. Letter-like form. Used as a dingbat. Not the same as \[SelectionPlaceholder].
Unicode: 03C2. Alias: Esc fs Esc. Greek letter. Used in written Greek when σ occurs at the end of a word. Not commonly used in technical notation. Not the same as \[Stigma].
Unicode: 03B3. Aliases: Esc g Esc, Esc gamma Esc. Greek letter. Used in TraditionalForm for EulerGamma and StieltjesGamma.
Unicode: 2265. Alias: Esc >= Esc. Infix operator with built-in evaluation rules. x ≥ y is by default interpreted as GreaterEqual[x,y].
Unicode: 02C7. Alias: Esc hck Esc. Letter-like form. Used primarily in an overscript position. Used as a diacritical mark in Eastern European languages. Sometimes used in ...
Unicode: F3CE. Alias: Esc hc Esc. Superscript postfix operator with built-in evaluation rules. m^ is by default interpreted as ConjugateTranspose[m]. Not the same as ...
Unicode: 221E. Alias: Esc inf Esc. Letter-like form with built-in value. ∞ is interpreted by default as the symbol Infinity.