List of letters used in mathematics, science, and engineering

This list is incomplete; you can help by adding missing items. (January 2011)

Latin and Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.

Hindu-Arabic numerals

Typographical variations of digits in Unicode
Name	Digits
Double-struck	𝟘 𝟙 𝟚 𝟛 𝟜 𝟝 𝟞 𝟟 𝟠 𝟡

א	Cardinality of infinite sets
ב	Cardinality of infinite sets
ג	Gimel function
ת	Tav (number)

よ	Yoneda embedding^[2]
サ	Satake compactification^[3]^[4]

Å	Angstrom
∀	Universal quantification
Đ	Dispersity
∂	Partial derivative
ð	Spin-weighted partial derivative
∃	Existential quantification
${\textstyle \hbar }$	Reduced Planck constant
Ø	Empty set
$\int$	Integral

∇	Del operator Gradient Divergence Curl
∈	Element (mathematics)
ƛ	Reduced wavelength
∐	Coproduct

^ Satou, Nobuo (2017-03-23). "AN ENHANCEMENT OF THE ZAGIER CONJECTURE( Dissertation_全文 )". Kyoto University Research Information Repository. doi:10.14989/doctor.k20155.
^ Li-Bland, David (2015). "The stack of higher internal categories and stacks of iterated spans". arXiv:1506.08870 [math.SG].
^ Mukai, Shigeru (11 January 1999). "Moduli of abelian surfaces and regular polyhedral groups". Moduli of Algebraic Varieties: 5–7. Archived from the original (PDF) on 18 April 2023.
^ Namikawa, Yukihiko (1980). "Main problem and main results". Toroidal Compactification of Siegel Spaces. Lecture Notes in Mathematics. Vol. 812. Springer. pp. 7–11. doi:10.1007/BFb0091053. ISBN 9783540381761.