{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4JJQ2BI3FDX2INA233UMBOQSH6","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":"c81aea7ec3b1f6772303d2f02d5f18ee20412a0e9eead0d6f3d2b1baa9b3e2ec","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-06T23:09:49Z","title_canon_sha256":"ee228bcc5033c1b88cc8715a67fbd19e118609bd7a240ab46d44bbc9c6337752"},"schema_version":"1.0","source":{"id":"2112.03413","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.03413","created_at":"2026-07-05T03:38:45Z"},{"alias_kind":"arxiv_version","alias_value":"2112.03413v1","created_at":"2026-07-05T03:38:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.03413","created_at":"2026-07-05T03:38:45Z"},{"alias_kind":"pith_short_12","alias_value":"4JJQ2BI3FDX2","created_at":"2026-07-05T03:38:45Z"},{"alias_kind":"pith_short_16","alias_value":"4JJQ2BI3FDX2INA2","created_at":"2026-07-05T03:38:45Z"},{"alias_kind":"pith_short_8","alias_value":"4JJQ2BI3","created_at":"2026-07-05T03:38:45Z"}],"graph_snapshots":[{"event_id":"sha256:5d9e402deef10a72d531f6bb32b565b1025a424791c9495ebe4cb9d3426212db","target":"graph","created_at":"2026-07-05T03:38:45Z","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/2112.03413/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Multi-dimensional optimization is widely used in virtually all areas of modern astrophysics. However, it is often too computationally expensive to evaluate a model on-the-fly. Typically, it is solved by pre-computing a grid of models for a predetermined set of positions in the parameter space and then interpolating. Here we present a hybrid minimization approach based on the local quadratic approximation of the $\\chi^2$ profile from a discrete set of models in a multidimensional parameter space. The main idea of our approach is to eliminate the interpolation of models from the process of findi","authors_text":"Evgenii Rubtsov, Igor Chilingarian, Ivan Katkov, Kirill Grishin, Sviatoslav Borisov, Vladimir Goradzhanov","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-06T23:09:49Z","title":"Hybrid minimization algorithm for computationally expensive multi-dimensional fitting"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.03413","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:adce8acdde368e357cd30fac05adcdfe49814275f8e4a8682620b5ac3f92b248","target":"record","created_at":"2026-07-05T03:38:45Z","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":"c81aea7ec3b1f6772303d2f02d5f18ee20412a0e9eead0d6f3d2b1baa9b3e2ec","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-06T23:09:49Z","title_canon_sha256":"ee228bcc5033c1b88cc8715a67fbd19e118609bd7a240ab46d44bbc9c6337752"},"schema_version":"1.0","source":{"id":"2112.03413","kind":"arxiv","version":1}},"canonical_sha256":"e2530d051b28efa4341adee8c0ba123f8d0cb206702f6adecc8f67e81ed6ede1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2530d051b28efa4341adee8c0ba123f8d0cb206702f6adecc8f67e81ed6ede1","first_computed_at":"2026-07-05T03:38:45.143367Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:38:45.143367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PKqVqh8LxbodwptWravujfJqaOIKTgVM2VQB2o7yB0Rn+oXWK99zCoIZf+M4SgGNF0/1O8znpc5oAOrwuFkVDg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:38:45.143784Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.03413","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:adce8acdde368e357cd30fac05adcdfe49814275f8e4a8682620b5ac3f92b248","sha256:5d9e402deef10a72d531f6bb32b565b1025a424791c9495ebe4cb9d3426212db"],"state_sha256":"5e438cf4d7592e5bfabfecd088d06637940ebcd48867bdcee6d6495b6a21ce66"}