Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links
Paper Citation Record · LEDGER
PT symmetry as a necessary and sufficient condition for unitary time evolution
As of 11 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 2 inbound Pith citation observations for arXiv:0912.2635.
A citation records a reference. It does not transfer a finding from one paper to another.
Coverage vector
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-11T06:34:44.6726+00:00
Pith citing papers itemized under the disclosed page cap.
Source: paper_references, paper_reference_links, observed 2026-08-11T12:42:50.973426Z
A source-named dated measurement, never combined with another source.
Source: pith, observed 2026-08-10T21:45:58.748738Z
Reference resolution
0 of 0 outbound references displayed
- verified exact0
- verified fuzzy0
- unresolved0
- parse uncertain0
- malformed identifier0
- metadata mismatch0
External citation measurements
No source-named external measurement is stored.
Outbound references
No outbound reference observations are available for this paper version.
Pith citing papers
Observation d27279d9-8af7-40cb-b667-7a3bda4890d9 · inbound
Oscillators with imaginary coupling: spectral functions in quantum mechanics and quantum field theory cites this paper.
Oscillators with imaginary coupling: spectral functions in quantum mechanics and quantum field theory PT symmetry as a necessary and sufficient condition for unitary time evolution
Reference 78
- Resolution
- unresolved
- no resolver link, observed 2026-08-11T12:42:50.973426Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation c86bb781-9ac0-4f21-9d26-e13c7a506a70 · inbound
Remarks on ghost resonances cites this paper.
Remarks on ghost resonances PT symmetry as a necessary and sufficient condition for unitary time evolution
Reference 60
- Resolution
- verified exact
- local_arxiv, observed 2026-08-10T21:45:58.755947Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.