{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:DRVKZMTS6YVOCHIO6LJ5XCZRWM","short_pith_number":"pith:DRVKZMTS","canonical_record":{"source":{"id":"2106.05235","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-06-09T17:20:19Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d6cdbbdeae4929a024a8af8203d40915f541c3aff80f767f83faf4d0b6872032","abstract_canon_sha256":"ee26db19ed5898d13b8e8a4d5a491a45307a8588ae05acf1cccac05e28404318"},"schema_version":"1.0"},"canonical_sha256":"1c6aacb272f62ae11d0ef2d3db8b31b32688ab70dba8d79c65ae31aa20aa65a5","source":{"kind":"arxiv","id":"2106.05235","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.05235","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"arxiv_version","alias_value":"2106.05235v3","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.05235","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"pith_short_12","alias_value":"DRVKZMTS6YVO","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"pith_short_16","alias_value":"DRVKZMTS6YVOCHIO","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"pith_short_8","alias_value":"DRVKZMTS","created_at":"2026-07-05T02:56:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:DRVKZMTS6YVOCHIO6LJ5XCZRWM","target":"record","payload":{"canonical_record":{"source":{"id":"2106.05235","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-06-09T17:20:19Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d6cdbbdeae4929a024a8af8203d40915f541c3aff80f767f83faf4d0b6872032","abstract_canon_sha256":"ee26db19ed5898d13b8e8a4d5a491a45307a8588ae05acf1cccac05e28404318"},"schema_version":"1.0"},"canonical_sha256":"1c6aacb272f62ae11d0ef2d3db8b31b32688ab70dba8d79c65ae31aa20aa65a5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:56:40.120157Z","signature_b64":"rmYPFv02b/u63HSEyYiYTs8E54VdARz0K3UXtwCMp0ua/hJChNVlXaQR7T0KHYLAOHdLYY8BX/RutykWHufUAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c6aacb272f62ae11d0ef2d3db8b31b32688ab70dba8d79c65ae31aa20aa65a5","last_reissued_at":"2026-07-05T02:56:40.119758Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:56:40.119758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.05235","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:56:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gn2AptrtAFDNijtkdooaywi0wTkgWPIJ34zujLTnkpmKoQxdYnyJyBJEUBqf7OWHKlIGcyzgWjECYweVXiHlAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-12T10:46:53.166677Z"},"content_sha256":"68e4b1958c682a506d35115781420662dc0dbdc16051cd5780a5277ab0a04375","schema_version":"1.0","event_id":"sha256:68e4b1958c682a506d35115781420662dc0dbdc16051cd5780a5277ab0a04375"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:DRVKZMTS6YVOCHIO6LJ5XCZRWM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Machine learning of superconducting critical temperature from Eliashberg theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.supr-con","authors_text":"A. C. Hire, B. Deng, G. R. Stewart, I. Salinas, J. J. Hamlin, J. Kim, J. Lim, J. M. DeStefano, L. Fanfarillo, P. J. Hirschfeld, R. G. Hennig, S. R. Xie, U. S. Shah, Y. Quan","submitted_at":"2021-06-09T17:20:19Z","abstract_excerpt":"The Eliashberg theory of superconductivity accounts for the fundamental physics of conventional electron-phonon superconductors, including the retardation of the interaction and the effect of the Coulomb pseudopotential, to predict the critical temperature $T_c$ and other properties. McMillan, Allen, and Dynes derived approximate closed-form expressions for the critical temperature predicted by this theory, which depends essentially on the electron-phonon spectral function $\\alpha^2F(\\omega)$, using $\\alpha^2F$ for low-$T_c$ superconductors. Here we show that modern machine learning techniques"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.05235","kind":"arxiv","version":3},"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/2106.05235/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":"2026-07-05T02:56:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+zd/hagN9Manl+pF5eKPzRPDkkuaUcjYvEZuq9XDCWeZlRKLdrWpDR9r1AhqWSxQGyt4kPakYFfwPia2cE9aBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-12T10:46:53.167487Z"},"content_sha256":"ce24ec44e1daa73f57d29eb3ac7c19871479c2572897af80be40f5fc874e25ab","schema_version":"1.0","event_id":"sha256:ce24ec44e1daa73f57d29eb3ac7c19871479c2572897af80be40f5fc874e25ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DRVKZMTS6YVOCHIO6LJ5XCZRWM/bundle.json","state_url":"https://pith.science/pith/DRVKZMTS6YVOCHIO6LJ5XCZRWM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DRVKZMTS6YVOCHIO6LJ5XCZRWM/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":"2026-07-12T10:46:53Z","links":{"resolver":"https://pith.science/pith/DRVKZMTS6YVOCHIO6LJ5XCZRWM","bundle":"https://pith.science/pith/DRVKZMTS6YVOCHIO6LJ5XCZRWM/bundle.json","state":"https://pith.science/pith/DRVKZMTS6YVOCHIO6LJ5XCZRWM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DRVKZMTS6YVOCHIO6LJ5XCZRWM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:DRVKZMTS6YVOCHIO6LJ5XCZRWM","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":"ee26db19ed5898d13b8e8a4d5a491a45307a8588ae05acf1cccac05e28404318","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-06-09T17:20:19Z","title_canon_sha256":"d6cdbbdeae4929a024a8af8203d40915f541c3aff80f767f83faf4d0b6872032"},"schema_version":"1.0","source":{"id":"2106.05235","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.05235","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"arxiv_version","alias_value":"2106.05235v3","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.05235","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"pith_short_12","alias_value":"DRVKZMTS6YVO","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"pith_short_16","alias_value":"DRVKZMTS6YVOCHIO","created_at":"2026-07-05T02:56:40Z"},{"alias_kind":"pith_short_8","alias_value":"DRVKZMTS","created_at":"2026-07-05T02:56:40Z"}],"graph_snapshots":[{"event_id":"sha256:ce24ec44e1daa73f57d29eb3ac7c19871479c2572897af80be40f5fc874e25ab","target":"graph","created_at":"2026-07-05T02:56:40Z","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/2106.05235/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Eliashberg theory of superconductivity accounts for the fundamental physics of conventional electron-phonon superconductors, including the retardation of the interaction and the effect of the Coulomb pseudopotential, to predict the critical temperature $T_c$ and other properties. McMillan, Allen, and Dynes derived approximate closed-form expressions for the critical temperature predicted by this theory, which depends essentially on the electron-phonon spectral function $\\alpha^2F(\\omega)$, using $\\alpha^2F$ for low-$T_c$ superconductors. Here we show that modern machine learning techniques","authors_text":"A. C. Hire, B. Deng, G. R. Stewart, I. Salinas, J. J. Hamlin, J. Kim, J. Lim, J. M. DeStefano, L. Fanfarillo, P. J. Hirschfeld, R. G. Hennig, S. R. Xie, U. S. Shah, Y. Quan","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-06-09T17:20:19Z","title":"Machine learning of superconducting critical temperature from Eliashberg theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.05235","kind":"arxiv","version":3},"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":"sha256:68e4b1958c682a506d35115781420662dc0dbdc16051cd5780a5277ab0a04375","target":"record","created_at":"2026-07-05T02:56:40Z","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":"ee26db19ed5898d13b8e8a4d5a491a45307a8588ae05acf1cccac05e28404318","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-06-09T17:20:19Z","title_canon_sha256":"d6cdbbdeae4929a024a8af8203d40915f541c3aff80f767f83faf4d0b6872032"},"schema_version":"1.0","source":{"id":"2106.05235","kind":"arxiv","version":3}},"canonical_sha256":"1c6aacb272f62ae11d0ef2d3db8b31b32688ab70dba8d79c65ae31aa20aa65a5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c6aacb272f62ae11d0ef2d3db8b31b32688ab70dba8d79c65ae31aa20aa65a5","first_computed_at":"2026-07-05T02:56:40.119758Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:56:40.119758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rmYPFv02b/u63HSEyYiYTs8E54VdARz0K3UXtwCMp0ua/hJChNVlXaQR7T0KHYLAOHdLYY8BX/RutykWHufUAA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:56:40.120157Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.05235","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:68e4b1958c682a506d35115781420662dc0dbdc16051cd5780a5277ab0a04375","sha256:ce24ec44e1daa73f57d29eb3ac7c19871479c2572897af80be40f5fc874e25ab"],"state_sha256":"8968c41f08dfd9c4e2a95676303d244b03769552434ad3341f5a9ee9b860b5eb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KEFR+w8dbkQBxqRtOF0hMoTeRBwRLWMec1u5NE3PwkgvljhRdVVsRMR+8j2uJ8nZ7Fdz/yZzxuTjzzqWfOpkDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-12T10:46:53.171045Z","bundle_sha256":"55c0a943f0de64b015f8aba2edc503fdd5345adc4d8b277fbdab91888de3da83"}}