1 http://hdl.handle.net/10338.dmlcz/144355 1 Contents of Previous Volumes http://hdl.handle.net/10338.dmlcz/144361 Contents of Previous Volumes The gap theorems for some extremal submanifolds in a unit sphere http://hdl.handle.net/10338.dmlcz/144360 The gap theorems for some extremal submanifolds in a unit sphere Newton transformations on null hypersurfaces http://hdl.handle.net/10338.dmlcz/144359 Newton transformations on null hypersurfaces On a class of nonlocal problem involving a critical exponent http://hdl.handle.net/10338.dmlcz/144358 On a class of nonlocal problem involving a critical exponent