L1A
       1. Review: Some Setting in the Last Semester
       2. Example: The Surface Given by z=h(x,y) with K(p)>0
 
 
L1B
       1. Example: The Surface Given by z=h(x,y) with K(p)<0
       2. Example: The Surface Given by z=h(x,y) with K(p)=0
 
 
L1C
       1. Example: Torus and Monkey Saddle