an:03755524
Zbl 0481.58013
McKean, H. P.
Curvature of an infinity-dimensional manifold related to Hill's equation
EN
J. Differ. Geom. 17, 523-529 (1982).
00146349
1982
j
58D15 58B20 34B30 43A60
class of periodic functions such that the corresponding Hill's operator has lowest eigenvalue 0; convex surface of co-dimension 1 in the space of all smooth periodic functions; sectional curvatures; principal curvatures; total curvature