{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:2GWSX3TPOXIA76ZLH4SAEZVNQD","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":"7a0971a74aaade46cebff1ffe038a7d828dec6d8a70df39e6361034c9e5b3c09","cross_cats_sorted":["astro-ph.CO","astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-25T14:32:24Z","title_canon_sha256":"a1cdafe0ccd3bfb3562c7fe0c4f793b8d615516d6cc651444c3fe1b0ea583568"},"schema_version":"1.0","source":{"id":"1704.07715","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07715","created_at":"2026-05-18T00:29:30Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07715v2","created_at":"2026-05-18T00:29:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07715","created_at":"2026-05-18T00:29:30Z"},{"alias_kind":"pith_short_12","alias_value":"2GWSX3TPOXIA","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2GWSX3TPOXIA76ZL","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2GWSX3TP","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:19309f490ba26c4805c89cd99a3e0822a476e7064d1bb1abd87855d42947091b","target":"graph","created_at":"2026-05-18T00:29:30Z","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"},"paper":{"abstract_excerpt":"Hamiltonian systems such as the gravitational N-body problem have time-reversal symmetry. However, all numerical N-body integration schemes, including symplectic ones, respect this property only approximately. In this paper, we present the new N-body integrator JANUS, for which we achieve exact time-reversal symmetry by combining integer and floating point arithmetic. JANUS is explicit, formally symplectic and satisfies Liouville's theorem exactly. Its order is even and can be adjusted between two and ten. We discuss the implementation ofJANUS and present tests of its accuracy and speed by per","authors_text":"Daniel Tamayo, Hanno Rein","cross_cats":["astro-ph.CO","astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-25T14:32:24Z","title":"JANUS: A bit-wise reversible integrator for N-body dynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07715","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:cafb4ced51fd1cb5f121741927fcf321dcc05d92e808661150eb58061a97e979","target":"record","created_at":"2026-05-18T00:29:30Z","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":"7a0971a74aaade46cebff1ffe038a7d828dec6d8a70df39e6361034c9e5b3c09","cross_cats_sorted":["astro-ph.CO","astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-25T14:32:24Z","title_canon_sha256":"a1cdafe0ccd3bfb3562c7fe0c4f793b8d615516d6cc651444c3fe1b0ea583568"},"schema_version":"1.0","source":{"id":"1704.07715","kind":"arxiv","version":2}},"canonical_sha256":"d1ad2bee6f75d00ffb2b3f240266ad80c789aa9a68b4f8fb8b2556ebcb24b3ac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d1ad2bee6f75d00ffb2b3f240266ad80c789aa9a68b4f8fb8b2556ebcb24b3ac","first_computed_at":"2026-05-18T00:29:30.689067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:29:30.689067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Jsmgpm0jfeKINCZ5nRqLEcJd2o2JS9FhE1eD8d1KzjjAxb9eDSpCOhkzoK44DgCfV6aCl7JjEJKSNqTZbVVcDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:29:30.689663Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.07715","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cafb4ced51fd1cb5f121741927fcf321dcc05d92e808661150eb58061a97e979","sha256:19309f490ba26c4805c89cd99a3e0822a476e7064d1bb1abd87855d42947091b"],"state_sha256":"6426f2f0108c925ea4e5ba2320ffd28493a499d7a3c0f76cf30757e2a7e1588e"}