{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:PK7G76MB2UV7MIH7FXBREQTLL7","short_pith_number":"pith:PK7G76MB","canonical_record":{"source":{"id":"1611.07799","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-23T13:55:27Z","cross_cats_sorted":[],"title_canon_sha256":"82c884fd5d56034cf8e673d41d1843b6100accb73e810b755087d869608beb73","abstract_canon_sha256":"ca3439d1c5f040cfdca58a24c58c66a8d48b514299987284176f2040f089a9cb"},"schema_version":"1.0"},"canonical_sha256":"7abe6ff981d52bf620ff2dc312426b5fd60d81067677725664eb6bc0620bafc4","source":{"kind":"arxiv","id":"1611.07799","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.07799","created_at":"2026-05-18T00:43:58Z"},{"alias_kind":"arxiv_version","alias_value":"1611.07799v2","created_at":"2026-05-18T00:43:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.07799","created_at":"2026-05-18T00:43:58Z"},{"alias_kind":"pith_short_12","alias_value":"PK7G76MB2UV7","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"PK7G76MB2UV7MIH7","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"PK7G76MB","created_at":"2026-05-18T12:30:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:PK7G76MB2UV7MIH7FXBREQTLL7","target":"record","payload":{"canonical_record":{"source":{"id":"1611.07799","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-23T13:55:27Z","cross_cats_sorted":[],"title_canon_sha256":"82c884fd5d56034cf8e673d41d1843b6100accb73e810b755087d869608beb73","abstract_canon_sha256":"ca3439d1c5f040cfdca58a24c58c66a8d48b514299987284176f2040f089a9cb"},"schema_version":"1.0"},"canonical_sha256":"7abe6ff981d52bf620ff2dc312426b5fd60d81067677725664eb6bc0620bafc4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:58.985092Z","signature_b64":"7ZzBiBjS5QETWQuJ/64TQgdNR0BAGGhuw8wz8QAwmCQVbuiJs9oLD3mWjVpl4JYP8DmyELABOHrWLkx7cZWvAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7abe6ff981d52bf620ff2dc312426b5fd60d81067677725664eb6bc0620bafc4","last_reissued_at":"2026-05-18T00:43:58.984279Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:58.984279Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.07799","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:43:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TmjS3tSrzgU0PxXHz0m+yAawgZSJCly/Ec3VRNUeAZIH/NY85bjMSlgKiB2r05t+iccB+u0diDLV+64yKf5vCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T02:59:55.766688Z"},"content_sha256":"c1520678bfda11fd5f157a3de1d497902680a236121e3df6e4c9aff3acac2f72","schema_version":"1.0","event_id":"sha256:c1520678bfda11fd5f157a3de1d497902680a236121e3df6e4c9aff3acac2f72"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:PK7G76MB2UV7MIH7FXBREQTLL7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electron and phonon spectra dynamics and features of phase transitions in sodium at P=0-100 GPa","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"E. A. Chingina, N. B. Volkov","submitted_at":"2016-11-23T13:55:27Z","abstract_excerpt":"Electron and phonon spectra dynamics, as well as features of structural transitions and melting of sodium under pressure within range 0 to 100 GPa are investigated. Electron and phonon spectra of crystal sodium are calculated ab initio within the density functional theory by means of the LMTART-7 software package (Savrasov-Savrasov: 1992; Savrasov: 1996; Savrasov: 2004), allowing the fully potential method of linear muffin-tin orbitals. Using the Lindemann measure and the calculated phonon spectra the theoretical values of melting points corresponding to the experimental data (Gregoryanz, et a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.07799","kind":"arxiv","version":2},"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":"2026-05-18T00:43:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sm8CGjKviM1UyOU9DpwPLYCpZlPpkvhJRvsPYCoWihocnRDIPlniyeCuAdQi0QsdbXnAuOFhwWUeyhJdp/hwDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T02:59:55.767031Z"},"content_sha256":"85a86303672ae59464381ddff667f4962aa27ecce666511a0c0aa33a42edcecc","schema_version":"1.0","event_id":"sha256:85a86303672ae59464381ddff667f4962aa27ecce666511a0c0aa33a42edcecc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PK7G76MB2UV7MIH7FXBREQTLL7/bundle.json","state_url":"https://pith.science/pith/PK7G76MB2UV7MIH7FXBREQTLL7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PK7G76MB2UV7MIH7FXBREQTLL7/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":"2026-06-26T02:59:55Z","links":{"resolver":"https://pith.science/pith/PK7G76MB2UV7MIH7FXBREQTLL7","bundle":"https://pith.science/pith/PK7G76MB2UV7MIH7FXBREQTLL7/bundle.json","state":"https://pith.science/pith/PK7G76MB2UV7MIH7FXBREQTLL7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PK7G76MB2UV7MIH7FXBREQTLL7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:PK7G76MB2UV7MIH7FXBREQTLL7","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":"ca3439d1c5f040cfdca58a24c58c66a8d48b514299987284176f2040f089a9cb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-23T13:55:27Z","title_canon_sha256":"82c884fd5d56034cf8e673d41d1843b6100accb73e810b755087d869608beb73"},"schema_version":"1.0","source":{"id":"1611.07799","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.07799","created_at":"2026-05-18T00:43:58Z"},{"alias_kind":"arxiv_version","alias_value":"1611.07799v2","created_at":"2026-05-18T00:43:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.07799","created_at":"2026-05-18T00:43:58Z"},{"alias_kind":"pith_short_12","alias_value":"PK7G76MB2UV7","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"PK7G76MB2UV7MIH7","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"PK7G76MB","created_at":"2026-05-18T12:30:39Z"}],"graph_snapshots":[{"event_id":"sha256:85a86303672ae59464381ddff667f4962aa27ecce666511a0c0aa33a42edcecc","target":"graph","created_at":"2026-05-18T00:43:58Z","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":"Electron and phonon spectra dynamics, as well as features of structural transitions and melting of sodium under pressure within range 0 to 100 GPa are investigated. Electron and phonon spectra of crystal sodium are calculated ab initio within the density functional theory by means of the LMTART-7 software package (Savrasov-Savrasov: 1992; Savrasov: 1996; Savrasov: 2004), allowing the fully potential method of linear muffin-tin orbitals. Using the Lindemann measure and the calculated phonon spectra the theoretical values of melting points corresponding to the experimental data (Gregoryanz, et a","authors_text":"E. A. Chingina, N. B. Volkov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-23T13:55:27Z","title":"Electron and phonon spectra dynamics and features of phase transitions in sodium at P=0-100 GPa"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.07799","kind":"arxiv","version":2},"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:c1520678bfda11fd5f157a3de1d497902680a236121e3df6e4c9aff3acac2f72","target":"record","created_at":"2026-05-18T00:43:58Z","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":"ca3439d1c5f040cfdca58a24c58c66a8d48b514299987284176f2040f089a9cb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-23T13:55:27Z","title_canon_sha256":"82c884fd5d56034cf8e673d41d1843b6100accb73e810b755087d869608beb73"},"schema_version":"1.0","source":{"id":"1611.07799","kind":"arxiv","version":2}},"canonical_sha256":"7abe6ff981d52bf620ff2dc312426b5fd60d81067677725664eb6bc0620bafc4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7abe6ff981d52bf620ff2dc312426b5fd60d81067677725664eb6bc0620bafc4","first_computed_at":"2026-05-18T00:43:58.984279Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:58.984279Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7ZzBiBjS5QETWQuJ/64TQgdNR0BAGGhuw8wz8QAwmCQVbuiJs9oLD3mWjVpl4JYP8DmyELABOHrWLkx7cZWvAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:58.985092Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.07799","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c1520678bfda11fd5f157a3de1d497902680a236121e3df6e4c9aff3acac2f72","sha256:85a86303672ae59464381ddff667f4962aa27ecce666511a0c0aa33a42edcecc"],"state_sha256":"75c692e6a0dfbc4d90b314e446a06591d65a187054924fb60bfff6efc15873e0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2WS+X6qx6MIXdC8Ay8rmBFWE/ka5Eldp0j4UWLPqg5SBgz8ktaJ9qIa6/TV1E+E0fsQMwDKG3odUf9+tqn4iDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T02:59:55.769004Z","bundle_sha256":"d71391b248d4b016dc76658f4f00fa4d73df6ef2e4f9c3447b78730012eea63a"}}