List of letters used in mathematics, science, and engineering

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	Template:Not a typo

Other scripts

Hebrew

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

Cyrillic

Л	Lobachevsky function<ref>Template:Cite journal</ref>
Ш	Tate–Shafarevich group Dirac comb
ш	Shuffle product

Japanese

よ	Yoneda embedding<ref>Template:Cite arXiv</ref>
サ	Satake compactification<ref>Template:Cite journal</ref><ref>Template:Cite book</ref>

Modified Latin

Å	Angstrom
∀	Universal quantification
Đ	Dispersity
∂	Partial derivative
ð	Spin-weighted partial derivative
∃	Existential quantification
<math display="inline">\hbar</math>	Reduced Planck constant
Ø	Empty set
<math>\int</math>	Integral

Modified Greek

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