{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:U4SFMNRANUAEIXBWAPXQ4KYBNZ","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":"839258cc0ffb362273b6d9b2a52f48414d2e683e39321857faa1842944c6ddd8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-08-08T13:55:17Z","title_canon_sha256":"1842eb26db4148add0c88b99dcad05d04939b5636086c0aac2ba24e1528ca14e"},"schema_version":"1.0","source":{"id":"astro-ph/0608174","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0608174","created_at":"2026-07-04T15:22:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0608174v2","created_at":"2026-07-04T15:22:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0608174","created_at":"2026-07-04T15:22:19Z"},{"alias_kind":"pith_short_12","alias_value":"U4SFMNRANUAE","created_at":"2026-07-04T15:22:19Z"},{"alias_kind":"pith_short_16","alias_value":"U4SFMNRANUAEIXBW","created_at":"2026-07-04T15:22:19Z"},{"alias_kind":"pith_short_8","alias_value":"U4SFMNRA","created_at":"2026-07-04T15:22:19Z"}],"graph_snapshots":[{"event_id":"sha256:cfca503af67fb9d0175b89c02a421b1e668e1e10119c8f8576ddbb72aacac711","target":"graph","created_at":"2026-07-04T15:22:19Z","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/astro-ph/0608174/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a method for accelerating the calculation of CMB power spectra, matter power spectra and likelihood functions for use in cosmological parameter estimation. The algorithm, called CosmoNet, is based on training a multilayer perceptron neural network and shares all the advantages of the recently released Pico algorithm of Fendt & Wandelt, but has several additional benefits in terms of simplicity, computational speed, memory requirements and ease of training. We demonstrate the capabilities of CosmoNet by computing CMB power spectra over a box in the parameter space of flat \\Lambda CDM","authors_text":"M. Bridges, M. P. Hobson, S. F. Gull, T. Auld","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-08-08T13:55:17Z","title":"Fast cosmological parameter estimation using neural networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0608174","kind":"arxiv","version":2},"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":"sha256:9b4c7c829aa7821655b5055c6ad774fc89213f9f031f0aa8e9368fdd5f3e2ac2","target":"record","created_at":"2026-07-04T15:22:19Z","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":"839258cc0ffb362273b6d9b2a52f48414d2e683e39321857faa1842944c6ddd8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-08-08T13:55:17Z","title_canon_sha256":"1842eb26db4148add0c88b99dcad05d04939b5636086c0aac2ba24e1528ca14e"},"schema_version":"1.0","source":{"id":"astro-ph/0608174","kind":"arxiv","version":2}},"canonical_sha256":"a7245636206d00445c3603ef0e2b016e4b38deaf7bede8cbdb252df76a801589","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7245636206d00445c3603ef0e2b016e4b38deaf7bede8cbdb252df76a801589","first_computed_at":"2026-07-04T15:22:19.826209Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:22:19.826209Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TFK/H60CGlMQUzWwru46tL/eLcR8kWVBd1+QsNF4saQJHrCRlfPbqCwx6aIA/URvSoIMdRFAQbqdhi0bvdGSAw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:22:19.826634Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0608174","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9b4c7c829aa7821655b5055c6ad774fc89213f9f031f0aa8e9368fdd5f3e2ac2","sha256:cfca503af67fb9d0175b89c02a421b1e668e1e10119c8f8576ddbb72aacac711"],"state_sha256":"21c401370521b03c2c6d7c3530408f6593881902b15261023193a039f467332a"}