{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:V7XY7RRDO5L6S5FA6JSEWPJ7XU","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"1a3db91a7760b4461d8fe3cf236ffa3df709109c99d419b7d00188a83a52838e","cross_cats_sorted":["nlin.SI","solv-int"],"license":"","primary_cat":"hep-th","submitted_at":"1997-05-23T18:58:54Z","title_canon_sha256":"89b5b9b40e45f751fc2142ec914a2fdd767b776ccad1e82185f4c8375b258f8b"},"schema_version":"1.0","source":{"id":"hep-th/9705187","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9705187","created_at":"2026-05-18T04:17:27Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9705187v1","created_at":"2026-05-18T04:17:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9705187","created_at":"2026-05-18T04:17:27Z"},{"alias_kind":"pith_short_12","alias_value":"V7XY7RRDO5L6","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"V7XY7RRDO5L6S5FA","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"V7XY7RRD","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:42a7d2ae70868efa054e33c025ad9eebfb9bae7cbdfe297e616ec5f32fb07735","target":"graph","created_at":"2026-05-18T04:17:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The antiferromagnetic Heisenberg spin chain with N spins has a sector with N=odd, in which the number of excitations is odd. In particular, there is a state with a single one-particle excitation. We exploit this fact to give a simplified derivation of the boundary S matrix for the open antiferromagnetic spin-1/2 Heisenberg spin chain with diagonal boundary magnetic fields.","authors_text":"Anastasia Doikou, Luca Mezincescu, Rafael I. Nepomechie","cross_cats":["nlin.SI","solv-int"],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1997-05-23T18:58:54Z","title":"Simplified Calculation of Boundary S Matrices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9705187","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5747d041b1438505a3e78fa452c1f2b2d623b609b6ed2be15a18baccce2e2ce6","target":"record","created_at":"2026-05-18T04:17:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"1a3db91a7760b4461d8fe3cf236ffa3df709109c99d419b7d00188a83a52838e","cross_cats_sorted":["nlin.SI","solv-int"],"license":"","primary_cat":"hep-th","submitted_at":"1997-05-23T18:58:54Z","title_canon_sha256":"89b5b9b40e45f751fc2142ec914a2fdd767b776ccad1e82185f4c8375b258f8b"},"schema_version":"1.0","source":{"id":"hep-th/9705187","kind":"arxiv","version":1}},"canonical_sha256":"afef8fc6237757e974a0f2644b3d3fbd122b39ecca3a6d5910515800818714f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"afef8fc6237757e974a0f2644b3d3fbd122b39ecca3a6d5910515800818714f9","first_computed_at":"2026-05-18T04:17:27.577235Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:17:27.577235Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Fq+f5nauN8Y+/AUp9SX4FOJo85Gcr7wWKBuM6770QbQ+VdA+Ogggz70CLIDmOkcFTnpTuzu+OggIMVpJvprlBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:17:27.577703Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9705187","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5747d041b1438505a3e78fa452c1f2b2d623b609b6ed2be15a18baccce2e2ce6","sha256:42a7d2ae70868efa054e33c025ad9eebfb9bae7cbdfe297e616ec5f32fb07735"],"state_sha256":"eefb67e046c152bd913eb46a80ddda1086bb0df6cc2208e8162c737666232a07"}