GlyphIndexExample notation
ψ(x) = x + 1
The function adds 1 to its input x.
Greek psi
Psi is written Ψ in uppercase and ψ in lowercase. Its mathematical role depends on how the formula defines it.
GREEK CAPITAL LETTER PSI
Appearance can vary by font.
Character details
♡→✦
3 code pointsMeaning and context
Psi is written Ψ in uppercase and ψ in lowercase. Its mathematical role depends on how the formula defines it.
How to use it
In ψ(x) = x + 1, ψ is the name of the function. Copy the full expression when the definition is needed to understand the letter.
Examples
Uppercase and lowercase
Ψ U+03A8 / ψ U+03C8
Uppercase and lowercase use different code points. Copy the case you need.
Similar shapes, different characters
Compare the lookalike
U+03A8The two forms differ in case and code point.
Greek small psi
U+03C8Copy the lowercase letter when that is the case used in the source material.
Sources and method
- Unicode 18.0.0 character database — Pinned standard character identities and properties; the application computes UTF encodings from the original text.
- Unicode normalization forms (Unicode 18.0.0)