{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:BY4TU4N54MBVGVOY7Y5MTTMKSH","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":"be0552ceff8bca53363d7aa826ee8dfec7f12bdfea7baeb8704c73c0ceddc5da","cross_cats_sorted":["physics.comp-ph","physics.plasm-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2003-02-18T12:26:58Z","title_canon_sha256":"ffd0942cb39b0f317f61b61079890e46c792c7e3d6337096cde4b12a9e4573bd"},"schema_version":"1.0","source":{"id":"astro-ph/0302343","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0302343","created_at":"2026-07-04T15:17:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0302343v1","created_at":"2026-07-04T15:17:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0302343","created_at":"2026-07-04T15:17:19Z"},{"alias_kind":"pith_short_12","alias_value":"BY4TU4N54MBV","created_at":"2026-07-04T15:17:19Z"},{"alias_kind":"pith_short_16","alias_value":"BY4TU4N54MBVGVOY","created_at":"2026-07-04T15:17:19Z"},{"alias_kind":"pith_short_8","alias_value":"BY4TU4N5","created_at":"2026-07-04T15:17:19Z"}],"graph_snapshots":[{"event_id":"sha256:b1d3800194878724bc450846fa2f2c98476482c528d5973e943732ea8e42fee0","target":"graph","created_at":"2026-07-04T15:17:19Z","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/0302343/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Noise is a problem of major concern for N-body simulations of structure formation in the early Universe, of galaxies and plasmas. Here for the first time we use wavelets to remove noise from N-body simulations of disc galaxies, and show that they become equivalent to simulations with two orders of magnitude more particles. We expect a comparable improvement in performance for cosmological and plasma simulations. Our wavelet code will be described in a following paper, and will then be available on request.","authors_text":"Alessandro B. Romeo, Cathy Horellou, Joeran Bergh","cross_cats":["physics.comp-ph","physics.plasm-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-02-18T12:26:58Z","title":"N-body simulations with two-orders-of-magnitude higher performance using wavelets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0302343","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:a403c3d7124bb4f9e7b1fb86b6679f26a5c9049c8ae5b30f86b12845e69168c1","target":"record","created_at":"2026-07-04T15:17:19Z","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":"be0552ceff8bca53363d7aa826ee8dfec7f12bdfea7baeb8704c73c0ceddc5da","cross_cats_sorted":["physics.comp-ph","physics.plasm-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2003-02-18T12:26:58Z","title_canon_sha256":"ffd0942cb39b0f317f61b61079890e46c792c7e3d6337096cde4b12a9e4573bd"},"schema_version":"1.0","source":{"id":"astro-ph/0302343","kind":"arxiv","version":1}},"canonical_sha256":"0e393a71bde3035355d8fe3ac9cd8a91e720b8bf94e71bc3786badc355259a03","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e393a71bde3035355d8fe3ac9cd8a91e720b8bf94e71bc3786badc355259a03","first_computed_at":"2026-07-04T15:17:19.840304Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:17:19.840304Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9pIX8N7ke9bZPbZB1j2JjzbhVX9UtJPER4MpbXrZGc2bTvsmWkE6JElTeR6QfH72yqdnXcInGMJUyduxXU06DA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:17:19.840773Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0302343","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a403c3d7124bb4f9e7b1fb86b6679f26a5c9049c8ae5b30f86b12845e69168c1","sha256:b1d3800194878724bc450846fa2f2c98476482c528d5973e943732ea8e42fee0"],"state_sha256":"22cb57874c5943c8912af2cb04e17c993e5ffcdfae9a3662c47bfc1a995c6d5d"}