ArticleTRANSLATION-FACTORABLE SURFACES IN THE 3-DIMENSIONAL EUCLIDEAN AND LORENTZIAN SPACES SATISFYING ∆ri = λiri SID AHMED DIFI, HAKEM ALI AND HANIFI ZOUBIR
ArticleTRANSLATION-FACTORABLE SURFACES IN THE 3-DIMENSIONAL EUCLIDEAN AND LORENTZIAN SPACES SATISFYING ∆ri = λiri SID AHMED DIFI, HAKEM ALI AND HANIFI ZOUBIR