Articles by S. G. Pyatkov:
| OaM-08-13 | » Existence of maximal semidefinite invariant subspaces and semigroup properties of some classes of ordinary differential operators (03/2014) |
| OaM-08-13 | » Existence of maximal semidefinite invariant subspaces and semigroup properties of some classes of ordinary differential operators (03/2014) |