{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:A75Y6EBIZKIUOSGHJZX5NUVED5","short_pith_number":"pith:A75Y6EBI","canonical_record":{"source":{"id":"2511.02064","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CG","submitted_at":"2025-11-03T21:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"a2525d46782be33c9874de0f97e10b33c6065435b124cef0ec7c64fc158f63e1","abstract_canon_sha256":"5f71ea201ff7694a9539e245f3b7889af2fcf4a86370f7295f92fa431a4835c3"},"schema_version":"1.0"},"canonical_sha256":"07fb8f1028ca914748c74e6fd6d2a41f4735bf3136ab866939193c5215300985","source":{"kind":"arxiv","id":"2511.02064","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2511.02064","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"arxiv_version","alias_value":"2511.02064v5","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2511.02064","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"pith_short_12","alias_value":"A75Y6EBIZKIU","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"pith_short_16","alias_value":"A75Y6EBIZKIUOSGH","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"pith_short_8","alias_value":"A75Y6EBI","created_at":"2026-07-03T01:17:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:A75Y6EBIZKIUOSGHJZX5NUVED5","target":"record","payload":{"canonical_record":{"source":{"id":"2511.02064","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CG","submitted_at":"2025-11-03T21:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"a2525d46782be33c9874de0f97e10b33c6065435b124cef0ec7c64fc158f63e1","abstract_canon_sha256":"5f71ea201ff7694a9539e245f3b7889af2fcf4a86370f7295f92fa431a4835c3"},"schema_version":"1.0"},"canonical_sha256":"07fb8f1028ca914748c74e6fd6d2a41f4735bf3136ab866939193c5215300985","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-03T01:17:14.361094Z","signature_b64":"MiACfrvIpE/m4LO5YiCgCgGf8+s5EOLaSLHp/vzPf9AoLTcqfj1Mz9K377OqJ1irTIatEiqyBaYS2jpZTO3cAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"07fb8f1028ca914748c74e6fd6d2a41f4735bf3136ab866939193c5215300985","last_reissued_at":"2026-07-03T01:17:14.360675Z","signature_status":"signed_v1","first_computed_at":"2026-07-03T01:17:14.360675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2511.02064","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-03T01:17:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rJjH7HPqCAWzXlmfhmVEtCzOFszyN8F5pSNFWzMiR0oBwSnFiOrb/7G2MCQR8Kr8dFXW+adWulIH55LTUhkjCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T10:08:36.494601Z"},"content_sha256":"06c5cd2e429478ef68b978c3c281982112bd8de7ccae31c4b5f2a907fa5c31f7","schema_version":"1.0","event_id":"sha256:06c5cd2e429478ef68b978c3c281982112bd8de7ccae31c4b5f2a907fa5c31f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:A75Y6EBIZKIUOSGHJZX5NUVED5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"MCHex: Marching Cubes Based Adaptive Hexahedral Mesh Generation with Guaranteed Positive Jacobian","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CG","authors_text":"Hua Tong, Yongjie Jessica Zhang","submitted_at":"2025-11-03T21:00:14Z","abstract_excerpt":"Grid-based methods are the most robust approach for automatic hexahedral (hex) meshing, but they struggle to achieve high boundary fidelity and element quality. Conventional pipelines remove outside elements. This yields axis-aligned surfaces that converge to the input geometry at first order. The subsequent padding and projection steps are heuristic, offering no guarantees on final boundary fidelity or mesh quality. This paper introduces MCHex, a fundamental reformulation of boundary and mesh quality handling in grid-based hex meshing. MCHex directly applies Marching Cubes (MC) inside each gr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2511.02064","kind":"arxiv","version":5},"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/2511.02064/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":"2026-07-03T01:17:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YcCp9jBTiLb7NbvPwooeNj0wUNG1NKDTBI+g2YOpL9nkyV6Mw9Xr5KCFWtSFl0fMxnAG+aVe/7xIcmupAV8GDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T10:08:36.495083Z"},"content_sha256":"34c494f662784cc245185123f5aac64178f1ac19d556f4599acdaa0eec0fec66","schema_version":"1.0","event_id":"sha256:34c494f662784cc245185123f5aac64178f1ac19d556f4599acdaa0eec0fec66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A75Y6EBIZKIUOSGHJZX5NUVED5/bundle.json","state_url":"https://pith.science/pith/A75Y6EBIZKIUOSGHJZX5NUVED5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A75Y6EBIZKIUOSGHJZX5NUVED5/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":"2026-08-06T10:08:36Z","links":{"resolver":"https://pith.science/pith/A75Y6EBIZKIUOSGHJZX5NUVED5","bundle":"https://pith.science/pith/A75Y6EBIZKIUOSGHJZX5NUVED5/bundle.json","state":"https://pith.science/pith/A75Y6EBIZKIUOSGHJZX5NUVED5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A75Y6EBIZKIUOSGHJZX5NUVED5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:A75Y6EBIZKIUOSGHJZX5NUVED5","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":"5f71ea201ff7694a9539e245f3b7889af2fcf4a86370f7295f92fa431a4835c3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CG","submitted_at":"2025-11-03T21:00:14Z","title_canon_sha256":"a2525d46782be33c9874de0f97e10b33c6065435b124cef0ec7c64fc158f63e1"},"schema_version":"1.0","source":{"id":"2511.02064","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2511.02064","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"arxiv_version","alias_value":"2511.02064v5","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2511.02064","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"pith_short_12","alias_value":"A75Y6EBIZKIU","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"pith_short_16","alias_value":"A75Y6EBIZKIUOSGH","created_at":"2026-07-03T01:17:14Z"},{"alias_kind":"pith_short_8","alias_value":"A75Y6EBI","created_at":"2026-07-03T01:17:14Z"}],"graph_snapshots":[{"event_id":"sha256:34c494f662784cc245185123f5aac64178f1ac19d556f4599acdaa0eec0fec66","target":"graph","created_at":"2026-07-03T01:17:14Z","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/2511.02064/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Grid-based methods are the most robust approach for automatic hexahedral (hex) meshing, but they struggle to achieve high boundary fidelity and element quality. Conventional pipelines remove outside elements. This yields axis-aligned surfaces that converge to the input geometry at first order. The subsequent padding and projection steps are heuristic, offering no guarantees on final boundary fidelity or mesh quality. This paper introduces MCHex, a fundamental reformulation of boundary and mesh quality handling in grid-based hex meshing. MCHex directly applies Marching Cubes (MC) inside each gr","authors_text":"Hua Tong, Yongjie Jessica Zhang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CG","submitted_at":"2025-11-03T21:00:14Z","title":"MCHex: Marching Cubes Based Adaptive Hexahedral Mesh Generation with Guaranteed Positive Jacobian"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2511.02064","kind":"arxiv","version":5},"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":"sha256:06c5cd2e429478ef68b978c3c281982112bd8de7ccae31c4b5f2a907fa5c31f7","target":"record","created_at":"2026-07-03T01:17:14Z","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":"5f71ea201ff7694a9539e245f3b7889af2fcf4a86370f7295f92fa431a4835c3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CG","submitted_at":"2025-11-03T21:00:14Z","title_canon_sha256":"a2525d46782be33c9874de0f97e10b33c6065435b124cef0ec7c64fc158f63e1"},"schema_version":"1.0","source":{"id":"2511.02064","kind":"arxiv","version":5}},"canonical_sha256":"07fb8f1028ca914748c74e6fd6d2a41f4735bf3136ab866939193c5215300985","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"07fb8f1028ca914748c74e6fd6d2a41f4735bf3136ab866939193c5215300985","first_computed_at":"2026-07-03T01:17:14.360675Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-03T01:17:14.360675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MiACfrvIpE/m4LO5YiCgCgGf8+s5EOLaSLHp/vzPf9AoLTcqfj1Mz9K377OqJ1irTIatEiqyBaYS2jpZTO3cAw==","signature_status":"signed_v1","signed_at":"2026-07-03T01:17:14.361094Z","signed_message":"canonical_sha256_bytes"},"source_id":"2511.02064","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:06c5cd2e429478ef68b978c3c281982112bd8de7ccae31c4b5f2a907fa5c31f7","sha256:34c494f662784cc245185123f5aac64178f1ac19d556f4599acdaa0eec0fec66"],"state_sha256":"fd3d1dfea446b28ae9eb55d7c3f52520ce0be901f7962d5d2639c15d247a4be5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"33Pcd+ACdz5V6JE8L/dteItibUOBI5TxHLxNhYwi7soIEQxphPIOIcnZNhs6SyFO+RW+VBuKdTMyWL7GiNzMBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T10:08:36.500155Z","bundle_sha256":"dc02f3ac9e3663b6ebab44ae8dd184ee7b04d629d67428c83e77c7ce4f56560e"}}