See also: Φ [U+03A6 GREEK CAPITAL LETTER PHI], ф [U+0444 CYRILLIC SMALL LETTER EF], Ф [U+0424 CYRILLIC CAPITAL LETTER EF], Փ [U+0553 ARMENIAN CAPITAL LETTER PIWR], and φ.
Named after Ancient Greek Φειδίας (Pheidías) ("Phidias"), who supposedly used the golden ratio in his work, by mathematician Mark Barr.
- (mathematics) The golden ratio, an irrational number with a value of approximately 1.618033988 which expresses the relationship that the sum of two quantities is to the larger quantity as the larger is to the smaller.
- (mathematics) Euler's totient function, an arithmetic function that counts totatives
Derived from its majuscule counterpart Φ.
φ • (ph) (lowercase, uppercase Φ)
- Lower-case phi (φεῖ), the 21st letter of the ancient Greek alphabet. It represented the voiceless aspirated bilabial plosive /pʰ/ and later the voiceless labiodental fricative /f/. It is preceded by υ and followed by χ.
See also phi
- φ΄, ͵φ
- ф, Ф (Cyrillic)
- փ (pʿ), Փ (Pʿ), ֆ (f), Ֆ (F) (Armenian)
- ⲫ, Ⲫ (Coptic)
- ɸ (IPA)
- ϕ (mathematical symbol)
φ • (f) (lowercase, uppercase Φ)
- The lower case letter phi (φι), the 21st letter of the modern Greek alphabet.