and Applied Analysis 3 in the normal bundle T⊥M, and AN is the shape operator of the second fundamental form. Moreover, we have g ANX, Y g h X,Y ,N , 2.4 where g denotes the Riemannian metric onM as well as the metric induced onM. The mean curvature vector H on M is given by

Key points .................................................................................................................. 559 H

c o l o r e d l i g h t r e f l e c t i o n s p r o d u c e d b y h i s m o b i l e s . H i s s h o r t J a m e s E . D a v i s , " F i g u r e S t u d y , " p e n c i l o n p a p e r , 1 9 3 4 . f i l m s , a v e r a g i n g a b o u t t e n m i n u t e s i n l e n g t h , w e r e o f t e n a c c o m p a n i e d b y o r i g i n a l m u s i c , s o m e t i m e s c o m p o s e d a n d a r r a n g...