Manifolds of Nonpositive Curvature (Progress in Mathematics; vol. 61)
by:
Werner Ballmann
·
Mikhael Gromov
·
Viktor Schroeder
Hardcover
details (
United States
).
ISBN: 978-0-8176-3181-9
ISBN-10: 0-8176-3181-X
Birkhäuser
· 1985