From Wikipedia, the free encyclopedia
De phi (haadletter Φ, ûnderkast φ of ϕ, Gryksk: φι) is de 21e letter fan it Grykske alfabet.
De phi wurdt útsprutsen as /f/, lykas yn foto. Oarspronklik waard de phi útsprutsen as in /pʰ/, lykas yn ophimmelje of as in /f/.
φ' is it Grykske sifer foar 500, ,φ foar 500 000.
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