{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:A5L3RQZN5NSEOX3NZD2OGZBUOZ","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":"0c6a877f89a83853eb087c0afe8d3a6a6ed348aceb68e56c29e41f6f966dd4cc","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-05-22T18:27:29Z","title_canon_sha256":"ace5c1fb2256dffc42a6f2794f8696404b50ebc0f91338809130b736cf78cdbb"},"schema_version":"1.0","source":{"id":"2505.17205","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.17205","created_at":"2026-07-05T11:07:48Z"},{"alias_kind":"arxiv_version","alias_value":"2505.17205v1","created_at":"2026-07-05T11:07:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.17205","created_at":"2026-07-05T11:07:48Z"},{"alias_kind":"pith_short_12","alias_value":"A5L3RQZN5NSE","created_at":"2026-07-05T11:07:48Z"},{"alias_kind":"pith_short_16","alias_value":"A5L3RQZN5NSEOX3N","created_at":"2026-07-05T11:07:48Z"},{"alias_kind":"pith_short_8","alias_value":"A5L3RQZN","created_at":"2026-07-05T11:07:48Z"}],"graph_snapshots":[{"event_id":"sha256:fc1762dce575e39b125aed542330ba33c78a5545bc1f6235e03b81526367967f","target":"graph","created_at":"2026-07-05T11:07:48Z","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/2505.17205/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, we reconstruct cosmic history via supervised learning through three methods: Classification and Regression Trees (CART), Multi-layer Perceptron Regressor (MLPR), and Support Vector Regression (SVR). For this purpose, we use ages of simulated galaxies based on 32 massive, early-time, passively evolving galaxies in the range $0.12 < z < 1.85$, with absolute ages determined. Using this sample, we simulate subsamples of 100, 1000, 2000, 3334, 6680 points, through the Monte Carlo Method and adopting a Gaussian distribution centering on a spatially flat $\\Lambda$CDM as a fiducial model","authors_text":"Agripino Sousa-Neto, Maria Aldinez Dantas","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-05-22T18:27:29Z","title":"Reconstructing Cosmic History with Machine Learning: A Study Using CART, MLPR, and SVR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.17205","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":"sha256:9de44b09e7446db80a1df20c3de2ebf588c48f55d3be7e9653de24ab6cbb0f67","target":"record","created_at":"2026-07-05T11:07:48Z","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":"0c6a877f89a83853eb087c0afe8d3a6a6ed348aceb68e56c29e41f6f966dd4cc","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-05-22T18:27:29Z","title_canon_sha256":"ace5c1fb2256dffc42a6f2794f8696404b50ebc0f91338809130b736cf78cdbb"},"schema_version":"1.0","source":{"id":"2505.17205","kind":"arxiv","version":1}},"canonical_sha256":"0757b8c32deb64475f6dc8f4e364347667fa01ec522f64476636bbaff67379fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0757b8c32deb64475f6dc8f4e364347667fa01ec522f64476636bbaff67379fa","first_computed_at":"2026-07-05T11:07:48.802562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:07:48.802562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"miVwwFnTIx2fkGzPsDAlt/Blw5QLlBhN5sF12PW4XQ6DFtI5uPDMEAC5q/AvOlVgjyfNSv9Od5trsa7utaJOAA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:07:48.803123Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.17205","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9de44b09e7446db80a1df20c3de2ebf588c48f55d3be7e9653de24ab6cbb0f67","sha256:fc1762dce575e39b125aed542330ba33c78a5545bc1f6235e03b81526367967f"],"state_sha256":"dd77ef51bda3010c15865ac1b977c8496ba86a86e7db509a7146acd8ebf898c7"}