{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SSNQCMQGN47ZK4RLDXDZP4R7WI","short_pith_number":"pith:SSNQCMQG","canonical_record":{"source":{"id":"1712.06121","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-12-17T14:22:14Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"6cc6dffa84d1f9c7db5ce887aab4a4ceb192965a2f842f2cefcc4f9c2f1574f6","abstract_canon_sha256":"cf8c1fde5296e47f136497b9dcc9c3afd7d8fd66d52fb1369e4809ada0ab07b7"},"schema_version":"1.0"},"canonical_sha256":"949b0132066f3f95722b1dc797f23fb21f78a33610ce1a0c31e31088ee2261e7","source":{"kind":"arxiv","id":"1712.06121","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.06121","created_at":"2026-05-18T00:09:36Z"},{"alias_kind":"arxiv_version","alias_value":"1712.06121v2","created_at":"2026-05-18T00:09:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.06121","created_at":"2026-05-18T00:09:36Z"},{"alias_kind":"pith_short_12","alias_value":"SSNQCMQGN47Z","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SSNQCMQGN47ZK4RL","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SSNQCMQG","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SSNQCMQGN47ZK4RLDXDZP4R7WI","target":"record","payload":{"canonical_record":{"source":{"id":"1712.06121","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-12-17T14:22:14Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"6cc6dffa84d1f9c7db5ce887aab4a4ceb192965a2f842f2cefcc4f9c2f1574f6","abstract_canon_sha256":"cf8c1fde5296e47f136497b9dcc9c3afd7d8fd66d52fb1369e4809ada0ab07b7"},"schema_version":"1.0"},"canonical_sha256":"949b0132066f3f95722b1dc797f23fb21f78a33610ce1a0c31e31088ee2261e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:36.220603Z","signature_b64":"q73XQJtj9u/ZVp/7O2d5LGOCOq25Lbbgnk60ryLEfz/gUh5cYHf3jiZb6p/wjt+WBx/6BLOE88gb5zLfb+XfAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"949b0132066f3f95722b1dc797f23fb21f78a33610ce1a0c31e31088ee2261e7","last_reissued_at":"2026-05-18T00:09:36.220106Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:36.220106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.06121","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:09:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cM9LwkJY5GWZW9+L1goQNXFtepC0kpev/Q1mczoYZ2lvqV+qEPYnl6Ywv7dwblM7wp6K7VR7n8EOuUTv+kbMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T23:03:24.347089Z"},"content_sha256":"1266dca1e3b683455fde33c2ac9511826c7159b21601b2d97d2501ab4140ccd0","schema_version":"1.0","event_id":"sha256:1266dca1e3b683455fde33c2ac9511826c7159b21601b2d97d2501ab4140ccd0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SSNQCMQGN47ZK4RLDXDZP4R7WI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"CUBE: An Information-optimized parallel Cosmological $N$-body Algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"Hao-Ran Yu, Ue-Li Pen, Xin Wang","submitted_at":"2017-12-17T14:22:14Z","abstract_excerpt":"Cosmological large scale structure $N$-body simulations are computation-light, memory-heavy problems in supercomputing. The considerable amount of memory is usually dominated by an inefficient way of storing more than sufficient phase space information of particles. We present a new parallel, information-optimized, particle-mesh-based $N$-body code CUBE, in which information-efficiency and memory-efficiency are increased by nearly an order of magnitude. This is accomplished by storing particle's relative phase space coordinates instead of global values, and in the format of fixed point as ligh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.06121","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:09:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EIXthMN9QpVDV2Wh+SKqDugKVjq2O/U34ZOzktATjUji9S5FIPPxJiFxvQ9ISksYCjjfregawJLqhUFFYXs+CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T23:03:24.347725Z"},"content_sha256":"cb977540c003a77883c8fd3eb739d88930634080261ecd0c023487e6e318d6e3","schema_version":"1.0","event_id":"sha256:cb977540c003a77883c8fd3eb739d88930634080261ecd0c023487e6e318d6e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SSNQCMQGN47ZK4RLDXDZP4R7WI/bundle.json","state_url":"https://pith.science/pith/SSNQCMQGN47ZK4RLDXDZP4R7WI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SSNQCMQGN47ZK4RLDXDZP4R7WI/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-21T23:03:24Z","links":{"resolver":"https://pith.science/pith/SSNQCMQGN47ZK4RLDXDZP4R7WI","bundle":"https://pith.science/pith/SSNQCMQGN47ZK4RLDXDZP4R7WI/bundle.json","state":"https://pith.science/pith/SSNQCMQGN47ZK4RLDXDZP4R7WI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SSNQCMQGN47ZK4RLDXDZP4R7WI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SSNQCMQGN47ZK4RLDXDZP4R7WI","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":"cf8c1fde5296e47f136497b9dcc9c3afd7d8fd66d52fb1369e4809ada0ab07b7","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-12-17T14:22:14Z","title_canon_sha256":"6cc6dffa84d1f9c7db5ce887aab4a4ceb192965a2f842f2cefcc4f9c2f1574f6"},"schema_version":"1.0","source":{"id":"1712.06121","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.06121","created_at":"2026-05-18T00:09:36Z"},{"alias_kind":"arxiv_version","alias_value":"1712.06121v2","created_at":"2026-05-18T00:09:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.06121","created_at":"2026-05-18T00:09:36Z"},{"alias_kind":"pith_short_12","alias_value":"SSNQCMQGN47Z","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SSNQCMQGN47ZK4RL","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SSNQCMQG","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:cb977540c003a77883c8fd3eb739d88930634080261ecd0c023487e6e318d6e3","target":"graph","created_at":"2026-05-18T00:09:36Z","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":"Cosmological large scale structure $N$-body simulations are computation-light, memory-heavy problems in supercomputing. The considerable amount of memory is usually dominated by an inefficient way of storing more than sufficient phase space information of particles. We present a new parallel, information-optimized, particle-mesh-based $N$-body code CUBE, in which information-efficiency and memory-efficiency are increased by nearly an order of magnitude. This is accomplished by storing particle's relative phase space coordinates instead of global values, and in the format of fixed point as ligh","authors_text":"Hao-Ran Yu, Ue-Li Pen, Xin Wang","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-12-17T14:22:14Z","title":"CUBE: An Information-optimized parallel Cosmological $N$-body Algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.06121","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":"sha256:1266dca1e3b683455fde33c2ac9511826c7159b21601b2d97d2501ab4140ccd0","target":"record","created_at":"2026-05-18T00:09:36Z","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":"cf8c1fde5296e47f136497b9dcc9c3afd7d8fd66d52fb1369e4809ada0ab07b7","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-12-17T14:22:14Z","title_canon_sha256":"6cc6dffa84d1f9c7db5ce887aab4a4ceb192965a2f842f2cefcc4f9c2f1574f6"},"schema_version":"1.0","source":{"id":"1712.06121","kind":"arxiv","version":2}},"canonical_sha256":"949b0132066f3f95722b1dc797f23fb21f78a33610ce1a0c31e31088ee2261e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"949b0132066f3f95722b1dc797f23fb21f78a33610ce1a0c31e31088ee2261e7","first_computed_at":"2026-05-18T00:09:36.220106Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:36.220106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q73XQJtj9u/ZVp/7O2d5LGOCOq25Lbbgnk60ryLEfz/gUh5cYHf3jiZb6p/wjt+WBx/6BLOE88gb5zLfb+XfAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:36.220603Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.06121","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1266dca1e3b683455fde33c2ac9511826c7159b21601b2d97d2501ab4140ccd0","sha256:cb977540c003a77883c8fd3eb739d88930634080261ecd0c023487e6e318d6e3"],"state_sha256":"7a419f07d41a2212d66e637b29bfb2ac29ebe2e03ddc11631318b4c68de1af25"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I2BIduW7ObqXp2+JhoCkM2PtIz6++x0s8MiU7tUT3mRkse1utJlbNQ4JmuED56OkymG5kJ+aKN41DYTZBzAhDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T23:03:24.350946Z","bundle_sha256":"8b95a83a0aecf4fe8c630a57e5b52ffe938f82c469f72ea61cce561d6e7ccefc"}}