Unicode: F4A0. Alias: Esc cross Esc. Infix operator with built-in evaluation rules. x y is by default interpreted as Cross[x,y]. Not the same as \[Times]. \[Cross] ...
Unicode: 03B5. Aliases: Esc ce Esc, Esc cepsilon Esc. Greek letter. Not the same as \[Element]. Used in physics for Fermi energy and dielectric constant.
Unicode: 03C6. Aliases: Esc j Esc, Esc cph Esc, Esc cphi Esc. Greek letter. Commonly used as a variant of ϕ.
Unicode: 03D1. Aliases: Esc cq Esc, Esc cth Esc, Esc ctheta Esc. Greek letter. Used in TraditionalForm for EllipticTheta and RiemannSiegelTheta.
Unicode: 2020. Alias: Esc dg Esc. Letter-like form. x^† is by default interpreted as SuperDagger[x]. Not the same as \[ConjugateTranspose].
Unicode: 010F. Alias: Esc dv Esc. Letter. Included in ISO Latin-2.
Unicode: 00F7. Alias: Esc div Esc. Infix operator with built-in evaluation rules. x ÷ y is by default interpreted as Divide[x,y] or x/y. x ÷ y ÷ z groups as (x ÷ y) ÷ z.
Unicode: 0131. Letter. Used when an i will have an overscript on top. May or may not match the ordinary i from the text font.
Unicode: F74A. Alias: Esc gg Esc. Letter-like form. Not by default assigned any interpretation in StandardForm. Interpreted as EulerGamma in TraditionalForm. Not the same as ...
Unicode: F749. Alias: Esc pp Esc. Letter-like form. Not by default assigned any interpretation. Not the same as \[Pi].