ARF may refer to:
In mathematics, the Arf invariant of a nonsingular quadratic form over a field of characteristic 2 was defined by Turkish mathematician Cahit Arf (1941) when he started the systematic study of quadratic forms over arbitrary fields of characteristic 2. The Arf invariant is the substitute, in characteristic 2, for the discriminant for quadratic forms in characteristic not 2. Arf used his invariant, among others, in his endeavor to classify quadratic forms in characteristic 2.
The Arfak catbird (Ailuroedus arfakianus) is a species of bowerbird (Ptilonorhynchidae) which can be found in the Bird's Head (Vogelkop) Peninsula in western New Guinea.
ARFU may refer to:
Arfaoui Sabeur (born (1984-11-08)8 November 1984) is a Tunisian male artistic gymnast, representing his nation at international competitions.
Arfon Jones is the Police and Crime Commissioner for North Wales Police. He is a member of Plaid Cymru and has been Councillor for Gwersyllt West ward on Wrexham County Borough Council since 2008.
Arfeuilles (Occitan Arfuelha) is a French commune in the Allier department in the Auvergne-Rhône-Alpes region of central France.
ADP-ribosylation factor GTPase-activating protein 3 is a protein that in humans is encoded by the ARFGAP3 gene.
Arfon is a constituency of the House of Commons of the Parliament of the United Kingdom (at Westminster).
The Arfon transmitting station is a facility for FM, DAB digital radio and television transmission near the villages of Nebo and Nasareth in Gwynedd, northwestern Wales (grid reference SH476493).