{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1994:Q36KCTDGN7MGD3DKKAO3MVT6DZ","short_pith_number":"pith:Q36KCTDG","canonical_record":{"source":{"id":"chao-dyn/9405011","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"chao-dyn","submitted_at":"1994-05-16T13:18:58Z","cross_cats_sorted":["nlin.CD"],"title_canon_sha256":"1528ed7901bc197f93bfc66a2506edd081f36d7d48e74805ad22c0a2c3d34098","abstract_canon_sha256":"d03ea302e4cab1bd22e69f56f48212c28b62ba4a6488648b59c7cab78993a722"},"schema_version":"1.0"},"canonical_sha256":"86fca14c666fd861ec6a501db6567e1e7b0b7489bf79009b92704fbe6e75340d","source":{"kind":"arxiv","id":"chao-dyn/9405011","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"chao-dyn/9405011","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"arxiv_version","alias_value":"chao-dyn/9405011v1","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.chao-dyn/9405011","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"pith_short_12","alias_value":"Q36KCTDGN7MG","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"Q36KCTDGN7MGD3DK","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"Q36KCTDG","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1994:Q36KCTDGN7MGD3DKKAO3MVT6DZ","target":"record","payload":{"canonical_record":{"source":{"id":"chao-dyn/9405011","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"chao-dyn","submitted_at":"1994-05-16T13:18:58Z","cross_cats_sorted":["nlin.CD"],"title_canon_sha256":"1528ed7901bc197f93bfc66a2506edd081f36d7d48e74805ad22c0a2c3d34098","abstract_canon_sha256":"d03ea302e4cab1bd22e69f56f48212c28b62ba4a6488648b59c7cab78993a722"},"schema_version":"1.0"},"canonical_sha256":"86fca14c666fd861ec6a501db6567e1e7b0b7489bf79009b92704fbe6e75340d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:21.258295Z","signature_b64":"gdtG1FtC237yp1EF2lmtwzT3aeryVChb7Eqnd8ymJkNkXKSg1kJlLvqizl4e99ZKPU7DT0dlqr6IzernGGP8AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"86fca14c666fd861ec6a501db6567e1e7b0b7489bf79009b92704fbe6e75340d","last_reissued_at":"2026-05-18T01:09:21.257778Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:21.257778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"chao-dyn/9405011","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iY5IK3eaZJZ0CtjpPsvKTHiRFeMDr7Bmc/zoofkaKgZgRK+pwjnjPTTcrATNSr7rHGXU0Opdf0e1B79puRRRDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T13:20:07.061906Z"},"content_sha256":"72b70684976d0402cbce0326fcd429d25321dcc4cccd0c3af0e704d6bdac2239","schema_version":"1.0","event_id":"sha256:72b70684976d0402cbce0326fcd429d25321dcc4cccd0c3af0e704d6bdac2239"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1994:Q36KCTDGN7MGD3DKKAO3MVT6DZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bifurcations of two coupled classical spin oscillators","license":"","headline":"","cross_cats":["nlin.CD"],"primary_cat":"chao-dyn","authors_text":"B.Rumpf, D-64289 Darmstadt, Germany), Hochschulstra{\\ss}e 8, H.Sauermann (Theoretische Festk\\\"orperphysik, Technische Hochschule Darmstadt","submitted_at":"1994-05-16T13:18:58Z","abstract_excerpt":"Two classical, damped and driven spin oscillators with an isotropic exchange interaction are considered. They represent a nontrivial physical system whose equations of motion are shown to allow for an analytic treatment of local codimension 1 and 2 bifurcations. In addition, numerical results are presented which exhibit a Feigenbaum route to chaos."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"chao-dyn/9405011","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UHU5NwnC1zpJd7mXkscXjPBw4WYZ/5ac9TaDhGD9l7kPaSeeq3s0aXFpSoYAnlx5mu4iCkihXUcCvU2qZ+KqBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T13:20:07.062275Z"},"content_sha256":"71932c26c71a4526f48c62dd79cd1cd6f602900be9ea242f998d62718b252d86","schema_version":"1.0","event_id":"sha256:71932c26c71a4526f48c62dd79cd1cd6f602900be9ea242f998d62718b252d86"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q36KCTDGN7MGD3DKKAO3MVT6DZ/bundle.json","state_url":"https://pith.science/pith/Q36KCTDGN7MGD3DKKAO3MVT6DZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q36KCTDGN7MGD3DKKAO3MVT6DZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-04T13:20:07Z","links":{"resolver":"https://pith.science/pith/Q36KCTDGN7MGD3DKKAO3MVT6DZ","bundle":"https://pith.science/pith/Q36KCTDGN7MGD3DKKAO3MVT6DZ/bundle.json","state":"https://pith.science/pith/Q36KCTDGN7MGD3DKKAO3MVT6DZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q36KCTDGN7MGD3DKKAO3MVT6DZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1994:Q36KCTDGN7MGD3DKKAO3MVT6DZ","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":"d03ea302e4cab1bd22e69f56f48212c28b62ba4a6488648b59c7cab78993a722","cross_cats_sorted":["nlin.CD"],"license":"","primary_cat":"chao-dyn","submitted_at":"1994-05-16T13:18:58Z","title_canon_sha256":"1528ed7901bc197f93bfc66a2506edd081f36d7d48e74805ad22c0a2c3d34098"},"schema_version":"1.0","source":{"id":"chao-dyn/9405011","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"chao-dyn/9405011","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"arxiv_version","alias_value":"chao-dyn/9405011v1","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.chao-dyn/9405011","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"pith_short_12","alias_value":"Q36KCTDGN7MG","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"Q36KCTDGN7MGD3DK","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"Q36KCTDG","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:71932c26c71a4526f48c62dd79cd1cd6f602900be9ea242f998d62718b252d86","target":"graph","created_at":"2026-05-18T01:09:21Z","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":"Two classical, damped and driven spin oscillators with an isotropic exchange interaction are considered. They represent a nontrivial physical system whose equations of motion are shown to allow for an analytic treatment of local codimension 1 and 2 bifurcations. In addition, numerical results are presented which exhibit a Feigenbaum route to chaos.","authors_text":"B.Rumpf, D-64289 Darmstadt, Germany), Hochschulstra{\\ss}e 8, H.Sauermann (Theoretische Festk\\\"orperphysik, Technische Hochschule Darmstadt","cross_cats":["nlin.CD"],"headline":"","license":"","primary_cat":"chao-dyn","submitted_at":"1994-05-16T13:18:58Z","title":"Bifurcations of two coupled classical spin oscillators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"chao-dyn/9405011","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":"sha256:72b70684976d0402cbce0326fcd429d25321dcc4cccd0c3af0e704d6bdac2239","target":"record","created_at":"2026-05-18T01:09:21Z","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":"d03ea302e4cab1bd22e69f56f48212c28b62ba4a6488648b59c7cab78993a722","cross_cats_sorted":["nlin.CD"],"license":"","primary_cat":"chao-dyn","submitted_at":"1994-05-16T13:18:58Z","title_canon_sha256":"1528ed7901bc197f93bfc66a2506edd081f36d7d48e74805ad22c0a2c3d34098"},"schema_version":"1.0","source":{"id":"chao-dyn/9405011","kind":"arxiv","version":1}},"canonical_sha256":"86fca14c666fd861ec6a501db6567e1e7b0b7489bf79009b92704fbe6e75340d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"86fca14c666fd861ec6a501db6567e1e7b0b7489bf79009b92704fbe6e75340d","first_computed_at":"2026-05-18T01:09:21.257778Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:21.257778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gdtG1FtC237yp1EF2lmtwzT3aeryVChb7Eqnd8ymJkNkXKSg1kJlLvqizl4e99ZKPU7DT0dlqr6IzernGGP8AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:21.258295Z","signed_message":"canonical_sha256_bytes"},"source_id":"chao-dyn/9405011","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:72b70684976d0402cbce0326fcd429d25321dcc4cccd0c3af0e704d6bdac2239","sha256:71932c26c71a4526f48c62dd79cd1cd6f602900be9ea242f998d62718b252d86"],"state_sha256":"a65307b29cb8a0c53d9536641c75ef7290e02c1db20737baa6c20181d498f836"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LlrhEGWsPaHjHQCM4XW9TjyZQw5ZE7+HqgMqX4Jav6Z7yreAH1TQx8JoSAjnsCr6+jMnc5qBo+tABnJRRFYEDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T13:20:07.064276Z","bundle_sha256":"87a3e9872ee554d6df87b2e98c65c8c21ad1dea755f95a078f424fc467646145"}}