{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:SN62OOVNJ6KPTX7DGE4ROCHDHL","short_pith_number":"pith:SN62OOVN","schema_version":"1.0","canonical_sha256":"937da73aad4f94f9dfe331391708e33af94cc158c4bac17c2aa2f8a59193282a","source":{"kind":"arxiv","id":"1304.0577","version":3},"attestation_state":"computed","paper":{"title":"Dimensionless constants and cosmological measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.class-ph"],"primary_cat":"astro-ph.CO","authors_text":"James Rich","submitted_at":"2013-04-02T09:49:25Z","abstract_excerpt":"The laws of physics have a set of fundamental constants, and it is generally admitted that only dimensionless combinations of constants have physical significance. These combinations include the electromagnetic and gravitational fine structure constants, $\\alpha=e^2/4\\pi\\epsilon_0\\hbar c$ and $\\alpha_G=Gm_p^2/\\hbar c$, along with the ratios of elementary-particles masses. Cosmological measurements clearly depend on the values of these constants in the past and can therefore give information on their time dependence if the effects of time-varying constants can be separated from the effects of c"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1304.0577","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-04-02T09:49:25Z","cross_cats_sorted":["physics.class-ph"],"title_canon_sha256":"e6a556231e6bc000a71656f82f4ded6bdbecf4c149ba026368e0bb529882b7d6","abstract_canon_sha256":"f940ab90766280f5115314aafbfadbc4656c565da26ad87e719e9637d91a4665"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:27:02.926778Z","signature_b64":"qHcnaGV109iI61BuRcT3YMu2roxbBOs2qBAR905wY7540npQwO/HWkWv6V1lJKpyTMevU2UfCgTFd9ziqg2wDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"937da73aad4f94f9dfe331391708e33af94cc158c4bac17c2aa2f8a59193282a","last_reissued_at":"2026-05-18T03:27:02.926203Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:27:02.926203Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dimensionless constants and cosmological measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.class-ph"],"primary_cat":"astro-ph.CO","authors_text":"James Rich","submitted_at":"2013-04-02T09:49:25Z","abstract_excerpt":"The laws of physics have a set of fundamental constants, and it is generally admitted that only dimensionless combinations of constants have physical significance. These combinations include the electromagnetic and gravitational fine structure constants, $\\alpha=e^2/4\\pi\\epsilon_0\\hbar c$ and $\\alpha_G=Gm_p^2/\\hbar c$, along with the ratios of elementary-particles masses. Cosmological measurements clearly depend on the values of these constants in the past and can therefore give information on their time dependence if the effects of time-varying constants can be separated from the effects of c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.0577","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1304.0577","created_at":"2026-05-18T03:27:02.926280+00:00"},{"alias_kind":"arxiv_version","alias_value":"1304.0577v3","created_at":"2026-05-18T03:27:02.926280+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.0577","created_at":"2026-05-18T03:27:02.926280+00:00"},{"alias_kind":"pith_short_12","alias_value":"SN62OOVNJ6KP","created_at":"2026-05-18T12:27:59.945178+00:00"},{"alias_kind":"pith_short_16","alias_value":"SN62OOVNJ6KPTX7D","created_at":"2026-05-18T12:27:59.945178+00:00"},{"alias_kind":"pith_short_8","alias_value":"SN62OOVN","created_at":"2026-05-18T12:27:59.945178+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL","json":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL.json","graph_json":"https://pith.science/api/pith-number/SN62OOVNJ6KPTX7DGE4ROCHDHL/graph.json","events_json":"https://pith.science/api/pith-number/SN62OOVNJ6KPTX7DGE4ROCHDHL/events.json","paper":"https://pith.science/paper/SN62OOVN"},"agent_actions":{"view_html":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL","download_json":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL.json","view_paper":"https://pith.science/paper/SN62OOVN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1304.0577&json=true","fetch_graph":"https://pith.science/api/pith-number/SN62OOVNJ6KPTX7DGE4ROCHDHL/graph.json","fetch_events":"https://pith.science/api/pith-number/SN62OOVNJ6KPTX7DGE4ROCHDHL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL/action/storage_attestation","attest_author":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL/action/author_attestation","sign_citation":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL/action/citation_signature","submit_replication":"https://pith.science/pith/SN62OOVNJ6KPTX7DGE4ROCHDHL/action/replication_record"}},"created_at":"2026-05-18T03:27:02.926280+00:00","updated_at":"2026-05-18T03:27:02.926280+00:00"}