{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:YLYZHPHTC2SM6ANS2AMD7CVVJN","short_pith_number":"pith:YLYZHPHT","canonical_record":{"source":{"id":"2012.00111","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-30T21:34:58Z","cross_cats_sorted":["astro-ph.GA","physics.data-an"],"title_canon_sha256":"f580de17b468e58ff5f7b45949bef724ad0daca4e00531a5c098b03ba0528f94","abstract_canon_sha256":"491bbfd7b39072aff57c24fa25f349b0b9f99010e358d089027bb7c5296c0a8a"},"schema_version":"1.0"},"canonical_sha256":"c2f193bcf316a4cf01b2d0183f8ab54b49eb51128569d314af653abe3745c326","source":{"kind":"arxiv","id":"2012.00111","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.00111","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"arxiv_version","alias_value":"2012.00111v1","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.00111","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"pith_short_12","alias_value":"YLYZHPHTC2SM","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"pith_short_16","alias_value":"YLYZHPHTC2SM6ANS","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"pith_short_8","alias_value":"YLYZHPHT","created_at":"2026-07-05T01:55:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:YLYZHPHTC2SM6ANS2AMD7CVVJN","target":"record","payload":{"canonical_record":{"source":{"id":"2012.00111","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-30T21:34:58Z","cross_cats_sorted":["astro-ph.GA","physics.data-an"],"title_canon_sha256":"f580de17b468e58ff5f7b45949bef724ad0daca4e00531a5c098b03ba0528f94","abstract_canon_sha256":"491bbfd7b39072aff57c24fa25f349b0b9f99010e358d089027bb7c5296c0a8a"},"schema_version":"1.0"},"canonical_sha256":"c2f193bcf316a4cf01b2d0183f8ab54b49eb51128569d314af653abe3745c326","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:55:32.599718Z","signature_b64":"4gFFzDCdkP2reN3noqICVP/K499dYny4hsFDMokcZlgagD3jSZlmp6164EYbB1quYdFAgww0tvejoKulI+jxBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c2f193bcf316a4cf01b2d0183f8ab54b49eb51128569d314af653abe3745c326","last_reissued_at":"2026-07-05T01:55:32.599280Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:55:32.599280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.00111","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:55:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lpCVZ7IFRFIzNelXl5RFaHDh12LTfigJxQtM+uUCuVRk61avgomcbrTLpB1N+Bise+L8Ls5k9+zWNlkUQ7a2Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T08:17:48.200508Z"},"content_sha256":"0470e7c53f4240e20876f0fbd66bc7f9c9517d4898507743a1437f5e230aaada","schema_version":"1.0","event_id":"sha256:0470e7c53f4240e20876f0fbd66bc7f9c9517d4898507743a1437f5e230aaada"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:YLYZHPHTC2SM6ANS2AMD7CVVJN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling assembly bias with machine learning and symbolic regression","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","physics.data-an"],"primary_cat":"astro-ph.CO","authors_text":"Digvijay Wadekar, Francisco Villaescusa-Navarro, Laurence Perreault-Levasseur, Shirley Ho","submitted_at":"2020-11-30T21:34:58Z","abstract_excerpt":"Upcoming 21cm surveys will map the spatial distribution of cosmic neutral hydrogen (HI) over unprecedented volumes. Mock catalogues are needed to fully exploit the potential of these surveys. Standard techniques employed to create these mock catalogs, like Halo Occupation Distribution (HOD), rely on assumptions such as the baryonic properties of dark matter halos only depend on their masses. In this work, we use the state-of-the-art magneto-hydrodynamic simulation IllustrisTNG to show that the HI content of halos exhibits a strong dependence on their local environment. We then use machine lear"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.00111","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2012.00111/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:55:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"++lYz7xkH0fPOKOxq1N38n65DgY2VvNmbJNZKfVDAFFmkNOO3+WTrbKZkS1F/G8WsYL+JFLNhJhXeH0aAQqpCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T08:17:48.200910Z"},"content_sha256":"1dab405478a6781fad821423417459d2682a81bb3b883da28df5d178a436a907","schema_version":"1.0","event_id":"sha256:1dab405478a6781fad821423417459d2682a81bb3b883da28df5d178a436a907"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YLYZHPHTC2SM6ANS2AMD7CVVJN/bundle.json","state_url":"https://pith.science/pith/YLYZHPHTC2SM6ANS2AMD7CVVJN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YLYZHPHTC2SM6ANS2AMD7CVVJN/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":"2026-08-21T08:17:48Z","links":{"resolver":"https://pith.science/pith/YLYZHPHTC2SM6ANS2AMD7CVVJN","bundle":"https://pith.science/pith/YLYZHPHTC2SM6ANS2AMD7CVVJN/bundle.json","state":"https://pith.science/pith/YLYZHPHTC2SM6ANS2AMD7CVVJN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YLYZHPHTC2SM6ANS2AMD7CVVJN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:YLYZHPHTC2SM6ANS2AMD7CVVJN","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":"491bbfd7b39072aff57c24fa25f349b0b9f99010e358d089027bb7c5296c0a8a","cross_cats_sorted":["astro-ph.GA","physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-30T21:34:58Z","title_canon_sha256":"f580de17b468e58ff5f7b45949bef724ad0daca4e00531a5c098b03ba0528f94"},"schema_version":"1.0","source":{"id":"2012.00111","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.00111","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"arxiv_version","alias_value":"2012.00111v1","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.00111","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"pith_short_12","alias_value":"YLYZHPHTC2SM","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"pith_short_16","alias_value":"YLYZHPHTC2SM6ANS","created_at":"2026-07-05T01:55:32Z"},{"alias_kind":"pith_short_8","alias_value":"YLYZHPHT","created_at":"2026-07-05T01:55:32Z"}],"graph_snapshots":[{"event_id":"sha256:1dab405478a6781fad821423417459d2682a81bb3b883da28df5d178a436a907","target":"graph","created_at":"2026-07-05T01:55:32Z","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/2012.00111/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Upcoming 21cm surveys will map the spatial distribution of cosmic neutral hydrogen (HI) over unprecedented volumes. Mock catalogues are needed to fully exploit the potential of these surveys. Standard techniques employed to create these mock catalogs, like Halo Occupation Distribution (HOD), rely on assumptions such as the baryonic properties of dark matter halos only depend on their masses. In this work, we use the state-of-the-art magneto-hydrodynamic simulation IllustrisTNG to show that the HI content of halos exhibits a strong dependence on their local environment. We then use machine lear","authors_text":"Digvijay Wadekar, Francisco Villaescusa-Navarro, Laurence Perreault-Levasseur, Shirley Ho","cross_cats":["astro-ph.GA","physics.data-an"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-30T21:34:58Z","title":"Modeling assembly bias with machine learning and symbolic regression"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.00111","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":"sha256:0470e7c53f4240e20876f0fbd66bc7f9c9517d4898507743a1437f5e230aaada","target":"record","created_at":"2026-07-05T01:55:32Z","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":"491bbfd7b39072aff57c24fa25f349b0b9f99010e358d089027bb7c5296c0a8a","cross_cats_sorted":["astro-ph.GA","physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-30T21:34:58Z","title_canon_sha256":"f580de17b468e58ff5f7b45949bef724ad0daca4e00531a5c098b03ba0528f94"},"schema_version":"1.0","source":{"id":"2012.00111","kind":"arxiv","version":1}},"canonical_sha256":"c2f193bcf316a4cf01b2d0183f8ab54b49eb51128569d314af653abe3745c326","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c2f193bcf316a4cf01b2d0183f8ab54b49eb51128569d314af653abe3745c326","first_computed_at":"2026-07-05T01:55:32.599280Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:55:32.599280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4gFFzDCdkP2reN3noqICVP/K499dYny4hsFDMokcZlgagD3jSZlmp6164EYbB1quYdFAgww0tvejoKulI+jxBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:55:32.599718Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.00111","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0470e7c53f4240e20876f0fbd66bc7f9c9517d4898507743a1437f5e230aaada","sha256:1dab405478a6781fad821423417459d2682a81bb3b883da28df5d178a436a907"],"state_sha256":"01fb9cb2bd1b8a6345a3367c7b00be557d94310cae4843d3bb7ab477b44a17c7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rv9THFGbhWZPpaaRvsvFX5Ta0JdXM+9luCFVSKVoQVsDQpQdkWMroXaQpVqPL4hLSf1wOMR90bbJtXlROtuuCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T08:17:48.204241Z","bundle_sha256":"7bf27e199350a6889fcbac70379690d16f67c90aa25d2136c621465f1771dca9"}}