{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:AGWXK3JTUL6SH36C6PKH3ROMI7","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":"074be42e02c423fd3a01062eeb18d14baae19220ec457ca20deae05609194e2b","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-07-12T13:06:06Z","title_canon_sha256":"95ae9e48c729de58da3a7c4014d725e5d8d8df4ade2656b196de99d3028f99c2"},"schema_version":"1.0","source":{"id":"2207.05509","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.05509","created_at":"2026-07-05T04:41:57Z"},{"alias_kind":"arxiv_version","alias_value":"2207.05509v2","created_at":"2026-07-05T04:41:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.05509","created_at":"2026-07-05T04:41:57Z"},{"alias_kind":"pith_short_12","alias_value":"AGWXK3JTUL6S","created_at":"2026-07-05T04:41:57Z"},{"alias_kind":"pith_short_16","alias_value":"AGWXK3JTUL6SH36C","created_at":"2026-07-05T04:41:57Z"},{"alias_kind":"pith_short_8","alias_value":"AGWXK3JT","created_at":"2026-07-05T04:41:57Z"}],"graph_snapshots":[{"event_id":"sha256:6728a2dcb22b68322b4926133ee1317b2d37efb3c177c3e47b0b2bc703ae87f6","target":"graph","created_at":"2026-07-05T04:41:57Z","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/2207.05509/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a new scheme to compensate for the small-scales approximations resulting from Particle-Mesh (PM) schemes for cosmological N-body simulations. This kind of simulations are fast and low computational cost realizations of the large scale structures, but lack resolution on small scales. To improve their accuracy, we introduce an additional effective force within the differential equations of the simulation, parameterized by a Fourier-space Neural Network acting on the PM-estimated gravitational potential. We compare the results for the matter power spectrum obtained to the ones obtained","authors_text":"Denise Lanzieri, Fran\\c{c}ois Lanusse, Jean-Luc Starck","cross_cats":["cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-07-12T13:06:06Z","title":"Hybrid Physical-Neural ODEs for Fast N-body Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.05509","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":"sha256:53cfd2289bee7e4a1f22c9bdf966e36144547b3ea3cb5c20e1f90b2bbcf686da","target":"record","created_at":"2026-07-05T04:41:57Z","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":"074be42e02c423fd3a01062eeb18d14baae19220ec457ca20deae05609194e2b","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-07-12T13:06:06Z","title_canon_sha256":"95ae9e48c729de58da3a7c4014d725e5d8d8df4ade2656b196de99d3028f99c2"},"schema_version":"1.0","source":{"id":"2207.05509","kind":"arxiv","version":2}},"canonical_sha256":"01ad756d33a2fd23efc2f3d47dc5cc47fbff7449cc7f84beb61f213a8d3454a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01ad756d33a2fd23efc2f3d47dc5cc47fbff7449cc7f84beb61f213a8d3454a1","first_computed_at":"2026-07-05T04:41:57.258643Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:41:57.258643Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0Mn1sICGpEYinOiX5/HGKXov0u4X1zQEqc0/RmLDhmWKiCH3Xdxo9Nz8GaQrdEJ8RB19UTqxMJZkCPXNfKSrAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:41:57.259057Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.05509","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:53cfd2289bee7e4a1f22c9bdf966e36144547b3ea3cb5c20e1f90b2bbcf686da","sha256:6728a2dcb22b68322b4926133ee1317b2d37efb3c177c3e47b0b2bc703ae87f6"],"state_sha256":"5576978d977a04edea14e988bc5ea46baa8bc621665997e230a3f2a20bb43436"}