{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:RPRFLB2Z4T4UMB566KADUJSQEZ","short_pith_number":"pith:RPRFLB2Z","canonical_record":{"source":{"id":"2108.13030","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-30T07:34:43Z","cross_cats_sorted":[],"title_canon_sha256":"c97e8ffbf82ef792cf6171162ec8a7478bbe45fb3dc10467a1e2538184608d4f","abstract_canon_sha256":"799739930126b0ef6fca99339ddcba64a97dbba2d55719802d4730c3cca3de5a"},"schema_version":"1.0"},"canonical_sha256":"8be2558759e4f94607bef2803a26502648dd7d8ee6cf20a80cf6b57afd770f3e","source":{"kind":"arxiv","id":"2108.13030","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.13030","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"arxiv_version","alias_value":"2108.13030v1","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.13030","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"pith_short_12","alias_value":"RPRFLB2Z4T4U","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"pith_short_16","alias_value":"RPRFLB2Z4T4UMB56","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"pith_short_8","alias_value":"RPRFLB2Z","created_at":"2026-07-05T03:17:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:RPRFLB2Z4T4UMB566KADUJSQEZ","target":"record","payload":{"canonical_record":{"source":{"id":"2108.13030","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-30T07:34:43Z","cross_cats_sorted":[],"title_canon_sha256":"c97e8ffbf82ef792cf6171162ec8a7478bbe45fb3dc10467a1e2538184608d4f","abstract_canon_sha256":"799739930126b0ef6fca99339ddcba64a97dbba2d55719802d4730c3cca3de5a"},"schema_version":"1.0"},"canonical_sha256":"8be2558759e4f94607bef2803a26502648dd7d8ee6cf20a80cf6b57afd770f3e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:17:58.665695Z","signature_b64":"xqf/4BQnHyz8r0uY0Y4veJpXfwZCVhzId5Z9ouQWiOKl+OPAGz08T4JwQF8IoS734wtEX2Eax2Y5TpP+kwDACQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8be2558759e4f94607bef2803a26502648dd7d8ee6cf20a80cf6b57afd770f3e","last_reissued_at":"2026-07-05T03:17:58.665269Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:17:58.665269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.13030","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":"2026-07-05T03:17:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"thALgCG0ulOm3yKng2b0AhrP/yae843OdMEA290Dx1jwcdRaB9Odehgk9G3pGjJJ7c22ghS76lg/uLfhO2I4DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T09:40:42.587249Z"},"content_sha256":"1e3bf506dfbd194d6dfa0a38c10b7b38b5f14ae384e4753878076751cc0facfe","schema_version":"1.0","event_id":"sha256:1e3bf506dfbd194d6dfa0a38c10b7b38b5f14ae384e4753878076751cc0facfe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:RPRFLB2Z4T4UMB566KADUJSQEZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Lithium Evolution of Giant Stars Observed by LAMOST and Kepler","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Chun-Qian Li, Gang Zhao, Hong-Liang Yan, Jian-rong Shi, Jinghua Zhang, Qi Gao, Shaolan Bi, Shuai Liu, Xianfei Zhang, Yaguang Li, Yan Li","submitted_at":"2021-08-30T07:34:43Z","abstract_excerpt":"Mapping lithium evolution for evolved stars will provide restrictions and constraints on the fundamental stellar interior physical processes, which further shed light on our understanding of the theory of stellar structure and evolution. Based on a sample of 1,848 giants with known evolutionary phases and lithium abundances from the LAMOST-\\kepler{} and LAMOST-\\emph{K}2 fields, we construct mass-radius diagrams to characterize the evolutionary features of lithium. The stars at red giant branch (RGB) phase show natural depletion along with their stellar evolution, particularly, there is no obvi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.13030","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2108.13030/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:17:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0Tt2+Or0RRHFCTkplUIdH9OPAIjM2U1g9hhj3ydaSB8m6fy5cTmRu6nrvbKvpb5+FLPR+lLe+9Q9QNVxqfIMCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T09:40:42.587639Z"},"content_sha256":"705c0133167a570d3100cd7cadb44f2c1921b503700678a2b08c891ef551ad83","schema_version":"1.0","event_id":"sha256:705c0133167a570d3100cd7cadb44f2c1921b503700678a2b08c891ef551ad83"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RPRFLB2Z4T4UMB566KADUJSQEZ/bundle.json","state_url":"https://pith.science/pith/RPRFLB2Z4T4UMB566KADUJSQEZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RPRFLB2Z4T4UMB566KADUJSQEZ/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":"2026-07-13T09:40:42Z","links":{"resolver":"https://pith.science/pith/RPRFLB2Z4T4UMB566KADUJSQEZ","bundle":"https://pith.science/pith/RPRFLB2Z4T4UMB566KADUJSQEZ/bundle.json","state":"https://pith.science/pith/RPRFLB2Z4T4UMB566KADUJSQEZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RPRFLB2Z4T4UMB566KADUJSQEZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:RPRFLB2Z4T4UMB566KADUJSQEZ","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":"799739930126b0ef6fca99339ddcba64a97dbba2d55719802d4730c3cca3de5a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-30T07:34:43Z","title_canon_sha256":"c97e8ffbf82ef792cf6171162ec8a7478bbe45fb3dc10467a1e2538184608d4f"},"schema_version":"1.0","source":{"id":"2108.13030","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.13030","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"arxiv_version","alias_value":"2108.13030v1","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.13030","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"pith_short_12","alias_value":"RPRFLB2Z4T4U","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"pith_short_16","alias_value":"RPRFLB2Z4T4UMB56","created_at":"2026-07-05T03:17:58Z"},{"alias_kind":"pith_short_8","alias_value":"RPRFLB2Z","created_at":"2026-07-05T03:17:58Z"}],"graph_snapshots":[{"event_id":"sha256:705c0133167a570d3100cd7cadb44f2c1921b503700678a2b08c891ef551ad83","target":"graph","created_at":"2026-07-05T03:17:58Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2108.13030/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Mapping lithium evolution for evolved stars will provide restrictions and constraints on the fundamental stellar interior physical processes, which further shed light on our understanding of the theory of stellar structure and evolution. Based on a sample of 1,848 giants with known evolutionary phases and lithium abundances from the LAMOST-\\kepler{} and LAMOST-\\emph{K}2 fields, we construct mass-radius diagrams to characterize the evolutionary features of lithium. The stars at red giant branch (RGB) phase show natural depletion along with their stellar evolution, particularly, there is no obvi","authors_text":"Chun-Qian Li, Gang Zhao, Hong-Liang Yan, Jian-rong Shi, Jinghua Zhang, Qi Gao, Shaolan Bi, Shuai Liu, Xianfei Zhang, Yaguang Li, Yan Li","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-30T07:34:43Z","title":"Lithium Evolution of Giant Stars Observed by LAMOST and Kepler"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.13030","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":"sha256:1e3bf506dfbd194d6dfa0a38c10b7b38b5f14ae384e4753878076751cc0facfe","target":"record","created_at":"2026-07-05T03:17:58Z","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":"799739930126b0ef6fca99339ddcba64a97dbba2d55719802d4730c3cca3de5a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-30T07:34:43Z","title_canon_sha256":"c97e8ffbf82ef792cf6171162ec8a7478bbe45fb3dc10467a1e2538184608d4f"},"schema_version":"1.0","source":{"id":"2108.13030","kind":"arxiv","version":1}},"canonical_sha256":"8be2558759e4f94607bef2803a26502648dd7d8ee6cf20a80cf6b57afd770f3e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8be2558759e4f94607bef2803a26502648dd7d8ee6cf20a80cf6b57afd770f3e","first_computed_at":"2026-07-05T03:17:58.665269Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:17:58.665269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xqf/4BQnHyz8r0uY0Y4veJpXfwZCVhzId5Z9ouQWiOKl+OPAGz08T4JwQF8IoS734wtEX2Eax2Y5TpP+kwDACQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:17:58.665695Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.13030","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e3bf506dfbd194d6dfa0a38c10b7b38b5f14ae384e4753878076751cc0facfe","sha256:705c0133167a570d3100cd7cadb44f2c1921b503700678a2b08c891ef551ad83"],"state_sha256":"29ed298e8e1f8bc6a812c1d18f6aee042b02b36635a5e9c29562cd715a0ce2ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f1AQEwrOBFnlQiyxo6lY/jylc7d9dyNDBWuCyjlBdvNeL31RGk8dqG/KsXJwhVAm7kY0S3eKyvxj6GownTitAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-13T09:40:42.589718Z","bundle_sha256":"f01bfbb4d0ff18dbd8f2765ad483372bdf9fede8aaf38101e0de22c445d29a26"}}