
doi: 10.1007/bf01017080
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
nonlocal boundary conditions, Spaces with indefinite inner product (Kreĭn spaces, Pontryagin spaces, etc.), Perturbation theory of linear operators, General theory of partial differential operators, Dilations, extensions, compressions of linear operators, realization of nontrivial perturbations, self-adjoint extensions of some symmetric linear relation in an indefinite metric space, elliptic operators of order \(m\), quantum models of point interactions
nonlocal boundary conditions, Spaces with indefinite inner product (Kreĭn spaces, Pontryagin spaces, etc.), Perturbation theory of linear operators, General theory of partial differential operators, Dilations, extensions, compressions of linear operators, realization of nontrivial perturbations, self-adjoint extensions of some symmetric linear relation in an indefinite metric space, elliptic operators of order \(m\), quantum models of point interactions
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 3 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
