{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:AXHPQH3CQPMOJ7CSGLMOXBYN5F","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":"83ccef5b1b5aff26a0d55ea778fb360db0755875e2c6e526d86c38e38b851b33","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-21T18:27:01Z","title_canon_sha256":"b833f7951b7484b9796059574754fda215ba4fe7993682aa67dc9170ed06bcd0"},"schema_version":"1.0","source":{"id":"1205.4678","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.4678","created_at":"2026-05-18T01:57:24Z"},{"alias_kind":"arxiv_version","alias_value":"1205.4678v4","created_at":"2026-05-18T01:57:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.4678","created_at":"2026-05-18T01:57:24Z"},{"alias_kind":"pith_short_12","alias_value":"AXHPQH3CQPMO","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AXHPQH3CQPMOJ7CS","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AXHPQH3C","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:ca9898592e009755a81b2ed0a29500baa11b548335b518c0b4ac08a919589c9e","target":"graph","created_at":"2026-05-18T01:57:24Z","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":"We consider $f(R, T)$ theory of gravity, where $R$ is the curvature scalar and $T$ the trace of the energy momentum tensor. Attention is attached to the special case, $f(R, T)= R+2f(T)$ and two expressions are assumed for the function $f(T)$, $\\frac{a_1T^n+b_1}{a_2T^n+b_2}$ and $a_3\\ln^{q}{(b_3T^m)}$, where $a_1$, $a_2$, $b_1$, $b_2$, $n$, $a_3$, $b_3$, $q$ and $m$ are input parameters. We observe that by adjusting suitably these input parameters, energy conditions can be satisfied. Moreover, an analyse of the perturbations and stabilities of de Sitter solutions and power-law solutions is perf","authors_text":"A. V. Monwanou, F. G. Alvarenga, Jean B. Chabi Orou, M. J. S. Houndjo","cross_cats":["astro-ph.CO","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-21T18:27:01Z","title":"Testing some f(R,T) gravity models from energy conditions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.4678","kind":"arxiv","version":4},"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":"sha256:41c58889f943a4b5c39639047a06d8ab140908f385fbe8d99500dbfc8902061e","target":"record","created_at":"2026-05-18T01:57:24Z","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":"83ccef5b1b5aff26a0d55ea778fb360db0755875e2c6e526d86c38e38b851b33","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-21T18:27:01Z","title_canon_sha256":"b833f7951b7484b9796059574754fda215ba4fe7993682aa67dc9170ed06bcd0"},"schema_version":"1.0","source":{"id":"1205.4678","kind":"arxiv","version":4}},"canonical_sha256":"05cef81f6283d8e4fc5232d8eb870de9708de73846ef6f5069f7c39a28419996","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05cef81f6283d8e4fc5232d8eb870de9708de73846ef6f5069f7c39a28419996","first_computed_at":"2026-05-18T01:57:24.957752Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:24.957752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fH/r4nByu9pwlJ97CKL9XrSZd8pRjZiyLWHzhwtfBe/QDHkIgwn4/gOtiNGf759zsiFZMLQI86LE3MfY2U5wAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:24.958188Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.4678","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41c58889f943a4b5c39639047a06d8ab140908f385fbe8d99500dbfc8902061e","sha256:ca9898592e009755a81b2ed0a29500baa11b548335b518c0b4ac08a919589c9e"],"state_sha256":"ce8417dedd4521ac028be08957214ba3a390b5eca96813c1d69cde4b38f866cf"}