{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:5LC3GMKL75UOEKJDJKZCLKCAEI","short_pith_number":"pith:5LC3GMKL","canonical_record":{"source":{"id":"1901.05190","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-16T09:21:20Z","cross_cats_sorted":["astro-ph.GA","physics.comp-ph","physics.flu-dyn"],"title_canon_sha256":"4d2a48c482bcd0b77597e6722f169201cb943e7de0cd22e220ab9e22156d6c8a","abstract_canon_sha256":"ce2d363ab0b94124724257896f00962cf875d840f890c0c51ad33ce1b872de7e"},"schema_version":"1.0"},"canonical_sha256":"eac5b3314bff68e229234ab225a840223d487dcb9111592b30f7b46e238ca9ea","source":{"kind":"arxiv","id":"1901.05190","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05190","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05190v3","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05190","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"pith_short_12","alias_value":"5LC3GMKL75UO","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5LC3GMKL75UOEKJD","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5LC3GMKL","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:5LC3GMKL75UOEKJDJKZCLKCAEI","target":"record","payload":{"canonical_record":{"source":{"id":"1901.05190","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-16T09:21:20Z","cross_cats_sorted":["astro-ph.GA","physics.comp-ph","physics.flu-dyn"],"title_canon_sha256":"4d2a48c482bcd0b77597e6722f169201cb943e7de0cd22e220ab9e22156d6c8a","abstract_canon_sha256":"ce2d363ab0b94124724257896f00962cf875d840f890c0c51ad33ce1b872de7e"},"schema_version":"1.0"},"canonical_sha256":"eac5b3314bff68e229234ab225a840223d487dcb9111592b30f7b46e238ca9ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:58.465588Z","signature_b64":"jhnVZ+AHelUzpZRAm9LYCi1KMGebeSMiwVs6gqQmCagMV6C1+mxnIDXlZeqWndVQ1bNDhVHOuvyher62q+b1Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eac5b3314bff68e229234ab225a840223d487dcb9111592b30f7b46e238ca9ea","last_reissued_at":"2026-05-17T23:47:58.465156Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:58.465156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.05190","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:47:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"91KPFAdqt9IUminBOdxEca2LF3ylBaRUNgPtcUychnxmakrhEIiPyfB+fsTFxFy/VpRumW+LGcx+VXI6Zy24BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T12:44:17.280812Z"},"content_sha256":"2cc4c8a44c66535c85c314b83f2a6ce69c9702aec408756c7007879bbb915efa","schema_version":"1.0","event_id":"sha256:2cc4c8a44c66535c85c314b83f2a6ce69c9702aec408756c7007879bbb915efa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:5LC3GMKL75UOEKJDJKZCLKCAEI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Local simulations of MRI turbulence with meshless methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","physics.comp-ph","physics.flu-dyn"],"primary_cat":"astro-ph.EP","authors_text":"Henrik Latter, Hongping Deng, Lucio Mayer, Philip F. Hopkins, Xue-Ning Bai","submitted_at":"2019-01-16T09:21:20Z","abstract_excerpt":"The magneto-rotational instability (MRI) is one of the most important processes in sufficiently ionized astrophysical disks. Grid-based simulations, especially those using the local shearing box approximation, provide a powerful tool to study the ensuing nonlinear turbulence. On the other hand, while meshless methods have been widely used in both cosmology, galactic dynamics, and planet formation they have not been fully deployed on the MRI problem. We present local unstratified and vertically stratified MRI simulations with two meshless MHD schemes: a recent implementation of SPH MHD (Price20"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05190","kind":"arxiv","version":3},"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":"2026-05-17T23:47:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2562DJfeTCVsXMGDNpTIe5NfE+lAAyOFVm/S6KefU9ivD8a9ury2vj1CJKXF5F5XO3nYL3PAIVHsSih49aRHDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T12:44:17.281162Z"},"content_sha256":"c20d8924b757f6f86538f0241c0ec20f7d8d9f768c0a55001fa75a6b81f448d2","schema_version":"1.0","event_id":"sha256:c20d8924b757f6f86538f0241c0ec20f7d8d9f768c0a55001fa75a6b81f448d2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5LC3GMKL75UOEKJDJKZCLKCAEI/bundle.json","state_url":"https://pith.science/pith/5LC3GMKL75UOEKJDJKZCLKCAEI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5LC3GMKL75UOEKJDJKZCLKCAEI/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":"2026-06-11T12:44:17Z","links":{"resolver":"https://pith.science/pith/5LC3GMKL75UOEKJDJKZCLKCAEI","bundle":"https://pith.science/pith/5LC3GMKL75UOEKJDJKZCLKCAEI/bundle.json","state":"https://pith.science/pith/5LC3GMKL75UOEKJDJKZCLKCAEI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5LC3GMKL75UOEKJDJKZCLKCAEI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:5LC3GMKL75UOEKJDJKZCLKCAEI","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":"ce2d363ab0b94124724257896f00962cf875d840f890c0c51ad33ce1b872de7e","cross_cats_sorted":["astro-ph.GA","physics.comp-ph","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-16T09:21:20Z","title_canon_sha256":"4d2a48c482bcd0b77597e6722f169201cb943e7de0cd22e220ab9e22156d6c8a"},"schema_version":"1.0","source":{"id":"1901.05190","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05190","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05190v3","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05190","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"pith_short_12","alias_value":"5LC3GMKL75UO","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5LC3GMKL75UOEKJD","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5LC3GMKL","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:c20d8924b757f6f86538f0241c0ec20f7d8d9f768c0a55001fa75a6b81f448d2","target":"graph","created_at":"2026-05-17T23:47:58Z","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":"The magneto-rotational instability (MRI) is one of the most important processes in sufficiently ionized astrophysical disks. Grid-based simulations, especially those using the local shearing box approximation, provide a powerful tool to study the ensuing nonlinear turbulence. On the other hand, while meshless methods have been widely used in both cosmology, galactic dynamics, and planet formation they have not been fully deployed on the MRI problem. We present local unstratified and vertically stratified MRI simulations with two meshless MHD schemes: a recent implementation of SPH MHD (Price20","authors_text":"Henrik Latter, Hongping Deng, Lucio Mayer, Philip F. Hopkins, Xue-Ning Bai","cross_cats":["astro-ph.GA","physics.comp-ph","physics.flu-dyn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-16T09:21:20Z","title":"Local simulations of MRI turbulence with meshless methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05190","kind":"arxiv","version":3},"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":"sha256:2cc4c8a44c66535c85c314b83f2a6ce69c9702aec408756c7007879bbb915efa","target":"record","created_at":"2026-05-17T23:47:58Z","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":"ce2d363ab0b94124724257896f00962cf875d840f890c0c51ad33ce1b872de7e","cross_cats_sorted":["astro-ph.GA","physics.comp-ph","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-16T09:21:20Z","title_canon_sha256":"4d2a48c482bcd0b77597e6722f169201cb943e7de0cd22e220ab9e22156d6c8a"},"schema_version":"1.0","source":{"id":"1901.05190","kind":"arxiv","version":3}},"canonical_sha256":"eac5b3314bff68e229234ab225a840223d487dcb9111592b30f7b46e238ca9ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eac5b3314bff68e229234ab225a840223d487dcb9111592b30f7b46e238ca9ea","first_computed_at":"2026-05-17T23:47:58.465156Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:58.465156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jhnVZ+AHelUzpZRAm9LYCi1KMGebeSMiwVs6gqQmCagMV6C1+mxnIDXlZeqWndVQ1bNDhVHOuvyher62q+b1Bg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:58.465588Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.05190","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2cc4c8a44c66535c85c314b83f2a6ce69c9702aec408756c7007879bbb915efa","sha256:c20d8924b757f6f86538f0241c0ec20f7d8d9f768c0a55001fa75a6b81f448d2"],"state_sha256":"7ad15ba91b1d1abd8907543d6dc71095b8ca122d918abe0607db32be8a953b60"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oeHX/9LgZBTplcf+52VumpR6rhNyPGGKAXaKwAfZ64WUi9h2Qh4PecHRPLtg1twOeyrvSXhGQ4CiumkPlxRPBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T12:44:17.283253Z","bundle_sha256":"9f85faf89ebb9764711958c959fa5932563fe887f83faa0ea9631541520cb139"}}