1
by Dubrovin, B.A., Fomenko, A.T., Novikov, S.P.
Published 1984
Springer New York
Table of Contents: ... The Differential Calculus of Tensors -- 5 The Elements of the Calculus of Variations -- 6 The Calculus...

2
by Dubrovin, B.A., Fomenko, A.T., Novikov, S.P.
Published 1985
Springer New York
... of them); Riemannian curvature; geodesics and the calculus of variations (including the conservation laws...