{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:E3KQHHAHMPOFNLQUNHI2R74FMU","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":"f3c169b5a2b4b9ab02446121c185fa61525a1e4d8840ad8d0154434e7951618a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-03-17T05:44:34Z","title_canon_sha256":"269f7fa507876c780c9a2571a4f4e9387fd2af826164dc2855cf0c43c5f27e5d"},"schema_version":"1.0","source":{"id":"1903.07031","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.07031","created_at":"2026-05-17T23:51:04Z"},{"alias_kind":"arxiv_version","alias_value":"1903.07031v1","created_at":"2026-05-17T23:51:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.07031","created_at":"2026-05-17T23:51:04Z"},{"alias_kind":"pith_short_12","alias_value":"E3KQHHAHMPOF","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"E3KQHHAHMPOFNLQU","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"E3KQHHAH","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:be1292b98ec85b713340df8891549c2af4f86e26c474c326ebe50cc845c47257","target":"graph","created_at":"2026-05-17T23:51:04Z","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":"In this article an overview of the historical development of the key ideas in the field of magnetism is presented. The presentation is semi-technical in nature.Starting by noting down important contribution of Greeks, William Gilbert, Coulomb, Poisson, Oersted, Ampere, Faraday, Maxwell, and Pierre Curie, we review early 20th century investigations by Paul Langevin and Pierre Weiss. The Langevin theory of paramagnetism and the Weiss theory of ferromagnetism were partly successful and real understanding of magnetism came with the advent of quantum mechanics. Van Vleck was the pioneer in applying","authors_text":"Arun M. Jayannavar, Navinder Singh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-03-17T05:44:34Z","title":"A Brief history of mangnetism"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.07031","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:a0538cbcf74d1001bb00e17c6bcd8ed7df15e7f565d9084b43642e07346a1aa3","target":"record","created_at":"2026-05-17T23:51:04Z","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":"f3c169b5a2b4b9ab02446121c185fa61525a1e4d8840ad8d0154434e7951618a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-03-17T05:44:34Z","title_canon_sha256":"269f7fa507876c780c9a2571a4f4e9387fd2af826164dc2855cf0c43c5f27e5d"},"schema_version":"1.0","source":{"id":"1903.07031","kind":"arxiv","version":1}},"canonical_sha256":"26d5039c0763dc56ae1469d1a8ff856521503d3292239011e80f07d52c00292e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"26d5039c0763dc56ae1469d1a8ff856521503d3292239011e80f07d52c00292e","first_computed_at":"2026-05-17T23:51:04.469255Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:04.469255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jfSvPsjKH9lHIFJ6eXppN8dtTFXJum8mqSELgP9rlPooLOAgm2HNwOYgsjpgtM/T1IYF3hFg2SPgh41fuShGAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:04.469762Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.07031","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0538cbcf74d1001bb00e17c6bcd8ed7df15e7f565d9084b43642e07346a1aa3","sha256:be1292b98ec85b713340df8891549c2af4f86e26c474c326ebe50cc845c47257"],"state_sha256":"4afee6170ae1ffd4468f9ec6ef98584a53b6859cc653a1f6cedbc810acb92e6a"}