{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1999:7PXZDLSYFJXGWK5MRWRDMUH3MU","short_pith_number":"pith:7PXZDLSY","schema_version":"1.0","canonical_sha256":"fbef91ae582a6e6b2bac8da23650fb6507979bfc0e9b0c32210153bcb3935dd1","source":{"kind":"arxiv","id":"gr-qc/9905052","version":1},"attestation_state":"computed","paper":{"title":"Effective time variation of G in a model universe with variable space dimension","license":"","headline":"","cross_cats":["astro-ph","hep-th"],"primary_cat":"gr-qc","authors_text":"F. Nasseri, M. Khorrami, R. Mansouri","submitted_at":"1999-05-15T11:34:06Z","abstract_excerpt":"Time variation of Newtonian gravitational constant, $G$, is studied in the model universe with variable space dimension proposed recently.\n  Using the Lagrangian formulation of these models, we find the effective gravitational constant as a function of time. To compare it with observational data, a test theory for the time variation of $G$ is formulated. We have assumed a power law behavior of the time variation of $G$ where the exponent $\\beta$ is itself time dependent. Within this test theory we are able to restrict the free parameter of the theories under consideration and give upper bounds"},"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":"gr-qc/9905052","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1999-05-15T11:34:06Z","cross_cats_sorted":["astro-ph","hep-th"],"title_canon_sha256":"86cae1fd4d343ba4c6eb34f5e6cebe18e2443fdb8f0c073e90c7cf946133637b","abstract_canon_sha256":"69eba95516132a0877ae0ae453270af5b943a460a02aaaf67da59c9cce56c4ae"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:15:27.289802Z","signature_b64":"4/vIbd01iEx6RhvwFOdPkYhOPOHDquyZ/jZHRuOCJqcJgNid7+L2IKXPbDnOMESjryFGd8coYSVpgyf7gsnwDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fbef91ae582a6e6b2bac8da23650fb6507979bfc0e9b0c32210153bcb3935dd1","last_reissued_at":"2026-05-18T04:15:27.289448Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:15:27.289448Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Effective time variation of G in a model universe with variable space dimension","license":"","headline":"","cross_cats":["astro-ph","hep-th"],"primary_cat":"gr-qc","authors_text":"F. Nasseri, M. Khorrami, R. Mansouri","submitted_at":"1999-05-15T11:34:06Z","abstract_excerpt":"Time variation of Newtonian gravitational constant, $G$, is studied in the model universe with variable space dimension proposed recently.\n  Using the Lagrangian formulation of these models, we find the effective gravitational constant as a function of time. To compare it with observational data, a test theory for the time variation of $G$ is formulated. We have assumed a power law behavior of the time variation of $G$ where the exponent $\\beta$ is itself time dependent. Within this test theory we are able to restrict the free parameter of the theories under consideration and give upper bounds"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9905052","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":""},"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":"gr-qc/9905052","created_at":"2026-05-18T04:15:27.289500+00:00"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9905052v1","created_at":"2026-05-18T04:15:27.289500+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9905052","created_at":"2026-05-18T04:15:27.289500+00:00"},{"alias_kind":"pith_short_12","alias_value":"7PXZDLSYFJXG","created_at":"2026-05-18T12:25:49.038998+00:00"},{"alias_kind":"pith_short_16","alias_value":"7PXZDLSYFJXGWK5M","created_at":"2026-05-18T12:25:49.038998+00:00"},{"alias_kind":"pith_short_8","alias_value":"7PXZDLSY","created_at":"2026-05-18T12:25:49.038998+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/7PXZDLSYFJXGWK5MRWRDMUH3MU","json":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU.json","graph_json":"https://pith.science/api/pith-number/7PXZDLSYFJXGWK5MRWRDMUH3MU/graph.json","events_json":"https://pith.science/api/pith-number/7PXZDLSYFJXGWK5MRWRDMUH3MU/events.json","paper":"https://pith.science/paper/7PXZDLSY"},"agent_actions":{"view_html":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU","download_json":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU.json","view_paper":"https://pith.science/paper/7PXZDLSY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=gr-qc/9905052&json=true","fetch_graph":"https://pith.science/api/pith-number/7PXZDLSYFJXGWK5MRWRDMUH3MU/graph.json","fetch_events":"https://pith.science/api/pith-number/7PXZDLSYFJXGWK5MRWRDMUH3MU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU/action/storage_attestation","attest_author":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU/action/author_attestation","sign_citation":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU/action/citation_signature","submit_replication":"https://pith.science/pith/7PXZDLSYFJXGWK5MRWRDMUH3MU/action/replication_record"}},"created_at":"2026-05-18T04:15:27.289500+00:00","updated_at":"2026-05-18T04:15:27.289500+00:00"}