Noncommutative Hall Effect
  When coordinates are noncommutative, the Hall effect is reinvestigated. The Hall conductivity is expressed with noncommutative parameters, so that in the commutative limit it tends to the conventional result. 
Akira Kokado (1), Takashi Okamura (2) and Takesi Saito (2) ((1) Kobe   International Univ., (2) Kwansei Gakuin Univ.)