### Refine

#### Has Fulltext

- yes (3) (remove)

#### Year of publication

- 2013 (3) (remove)

#### Is part of the Bibliography

- yes (3) (remove)

#### Keywords

- Cauchy data spaces (1)
- Euler equations (1)
- Euler-Lagrange equations (1)
- Extremal problem (1)
- Fredholm property (1)
- Laplace-Beltrami operator (1)
- Toeplitz operators (1)
- equivalence (1)
- invariant (1)
- mixed problems (1)