{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","short_pith_number":"pith:HWJND6ET","canonical_record":{"source":{"id":"2607.18608","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.comp-ph","submitted_at":"2026-07-21T01:02:08Z","cross_cats_sorted":[],"title_canon_sha256":"c14963f04d6dbec88fc165f3337fbedf92845968066f3307e63b1ee5bb3640a8","abstract_canon_sha256":"7e166aaf3fdb3858e2c7b3bc8a99d7577a2b0775c2d89f58bb9f5677dbc483b9"},"schema_version":"1.0"},"canonical_sha256":"3d92d1f8937fa4b45e3a717cce4be64c49c2ec5c0eda0030639c1356f1680ed0","source":{"kind":"arxiv","id":"2607.18608","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.18608","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"arxiv_version","alias_value":"2607.18608v1","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.18608","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"pith_short_12","alias_value":"HWJND6ETP6SL","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"pith_short_16","alias_value":"HWJND6ETP6SLIXR2","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"pith_short_8","alias_value":"HWJND6ET","created_at":"2026-07-22T00:22:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","target":"record","payload":{"canonical_record":{"source":{"id":"2607.18608","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.comp-ph","submitted_at":"2026-07-21T01:02:08Z","cross_cats_sorted":[],"title_canon_sha256":"c14963f04d6dbec88fc165f3337fbedf92845968066f3307e63b1ee5bb3640a8","abstract_canon_sha256":"7e166aaf3fdb3858e2c7b3bc8a99d7577a2b0775c2d89f58bb9f5677dbc483b9"},"schema_version":"1.0"},"canonical_sha256":"3d92d1f8937fa4b45e3a717cce4be64c49c2ec5c0eda0030639c1356f1680ed0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-22T00:22:56.484384Z","signature_b64":"J7saw0QQSDTCe4Yqdsz1mqPCMVUX85X2VYAJ7pk1clcRT79uZCYatm/wuRu9W2FzjRLGuIYuKxzy/Kf39EkIAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3d92d1f8937fa4b45e3a717cce4be64c49c2ec5c0eda0030639c1356f1680ed0","last_reissued_at":"2026-07-22T00:22:56.483562Z","signature_status":"signed_v1","first_computed_at":"2026-07-22T00:22:56.483562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.18608","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":"2026-07-22T00:22:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KBzVFhJwmj6Mks0D/6SiuEJYgpgJfCVQb3Ems4uYWvD2sp6go//jQi2eTEh1bEptoTBg1sQIZ56wtu4pGdneAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:15:45.041951Z"},"content_sha256":"6fb5e1b3c43d94dbbbc0255b9ce699d9f409c2a732af12b4cd3924a1c11527a3","schema_version":"1.0","event_id":"sha256:6fb5e1b3c43d94dbbbc0255b9ce699d9f409c2a732af12b4cd3924a1c11527a3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Isochoric thermodynamic preconditioning for resolving mechanically induced phase change in fractured porous media","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.comp-ph","authors_text":"Eirik Keilegavlen, Inga Berre, Veljko Lipovac","submitted_at":"2026-07-21T01:02:08Z","abstract_excerpt":"Rapid pore-volume changes can trigger phase change on timescales shorter than characteristic transport times and may therefore be skipped by conventional nonlinear solves and adaptive time stepping. We present a persistent-variable framework for transport in fractured porous media, introducing specific volume as an independent variable. Starting from a fully coupled system, we derive volume-based models and recover classical pressure-based formulations by eliminating local thermodynamic variables. To resolve abrupt fracture opening, we introduce a nonlinear preconditioner that assumes instanta"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.18608","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/2607.18608/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":"2026-07-22T00:22:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7aSw8yqx5tCsOWpD+61d8UWTQr9sV8JpfPfhSNYrXgk14dN3nijxpW124KlruYvkR6WWhMlcZWJoxerXwu5zCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:15:45.042327Z"},"content_sha256":"6acca0130ea9724cd0020288d417db7994c4d1cd64b6601e4e277dedfc7f492d","schema_version":"1.0","event_id":"sha256:6acca0130ea9724cd0020288d417db7994c4d1cd64b6601e4e277dedfc7f492d"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","target":"integrity","payload":{"note":"DOI is split by whitespace or line breaks in the printed bibliography. Reconstructed DOI 10.1090/conm/295/04999 resolves to 'Modeling fractures as interfaces for flow and transport in porous media'. A reader following the printed text alone cannot reach it.","snippet":"Clarisse Alboin et al. “Modeling fractures as interfaces for flow and transport in porous media” . In:Fluid flow and transport in porous media: mathematical and numerical treatment (South Hadley, MA, 2001). Vol. 295. Contemp. Math. Amer. Ma","arxiv_id":"2607.18608","detector":"doi_compliance","evidence":{"ref_index":52,"verdict_class":"incontrovertible","resolved_title":"Modeling fractures as interfaces for flow and transport in porous media","printed_excerpt":"10.1090/conm/295/","reconstructed_doi":"10.1090/conm/295/04999"},"severity":"advisory","ref_index":52,"audited_at":"2026-08-01T14:59:28.159630Z","event_type":"pith.integrity.v1","detected_doi":"10.1090/conm/295/04999","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"0675a10e5ddce8101f1152bd888376bb88d3ab5fbabdffd788c7796bfc8eda0f","paper_version":1,"verdict_class":"incontrovertible","resolved_title":"Modeling fractures as interfaces for flow and transport in porous media","detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":16023,"payload_sha256":"e517b83adffeae7bc4484d5cf90602bbcdfc0e166cbafb66d28e81851031412f","signature_b64":"ecpk22v4YgS7cS5EBOgv6AbydDGOr/HCKtesIX2Qne2styMgvMchC8TGcNjpS8OTDrtMcaNfTauwcqhmBgnrAw==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T15:03:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bw+l08gfLbQG2zwFSfgLlx7+bdd6/CciIqXQYcDPhT10VxnjYBqFNy4EA0lN0xb4Y41H+6Cxk/8pPCRzbL2MAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:15:45.044321Z"},"content_sha256":"2c575689338bf5c34af39c28f54e0843abbc5e2ff90ee9a9aed90fab85ff4061","schema_version":"1.0","event_id":"sha256:2c575689338bf5c34af39c28f54e0843abbc5e2ff90ee9a9aed90fab85ff4061"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","target":"integrity","payload":{"note":"DOI is split by whitespace or line breaks in the printed bibliography. Reconstructed DOI 10.2118/952327-G resolves to 'Procedure for Use of Electronic Digital Computers in Calculating Flash Vaporization Hydrocarbon Equilibrium'. A reader following the printed text alone cannot reach it.","snippet":"Henry H. Rachford and J. D. Rice. “Procedure for use of electronic digital computers in calculating flash vaporiza- tion hydrocarbon equilibrium” . In:Journal of Petroleum Technology4.10 (1952), pp. 19–3.doi:10.2118/952327- G","arxiv_id":"2607.18608","detector":"doi_compliance","evidence":{"ref_index":14,"verdict_class":"incontrovertible","resolved_title":"Procedure for Use of Electronic Digital Computers in Calculating Flash Vaporization Hydrocarbon Equilibrium","printed_excerpt":"10.2118/952327-","reconstructed_doi":"10.2118/952327-G"},"severity":"advisory","ref_index":14,"audited_at":"2026-08-01T14:59:28.159630Z","event_type":"pith.integrity.v1","detected_doi":"10.2118/952327-G","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"12b8ddb8abae4e5f872cc1df1b2594387481a1b459a3580cc2f54e6ac362233e","paper_version":1,"verdict_class":"incontrovertible","resolved_title":"Procedure for Use of Electronic Digital Computers in Calculating Flash Vaporization Hydrocarbon Equilibrium","detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":16022,"payload_sha256":"e78b620fe92c4eb77c744cd734a877bcbcd0569f3a15b58a4b7f5b4b83dcef7c","signature_b64":"sf0uJWDw2Tc+piZsKV6z94lMmApbAIZjZr6xKM966uRwV/eDqmKB/giKaYry89Ek9FPUAEAhqe2saVidTmLtDA==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T15:03:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S2i+I1GAcnWQr9m97v/n+Lvl0VYYcB6oNYnVlYhHIHpC5+nYJTzefLJx9aPsgADUZL3w5dtw7fzMwVUxlVN6Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:15:45.044609Z"},"content_sha256":"8cf2e92d373c93034983a3035f24eff023d4ec27a2cd9946925670844dae93f7","schema_version":"1.0","event_id":"sha256:8cf2e92d373c93034983a3035f24eff023d4ec27a2cd9946925670844dae93f7"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","target":"integrity","payload":{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.1007/s11242-018-1077-3) was visible in the surrounding text but could not be confirmed against doi.org as printed.","snippet":"Ivar Stefansson, Inga Berre, and Eirik Keilegavlen. “Finite-Volume Discretisations for Flow in Fractured Porous Media” . In:Transport in Porous Media124.2 (Sept. 2018), pp. 439–462.issn: 1573-1634.doi:10.1007/s11242- 018-1077-3","arxiv_id":"2607.18608","detector":"doi_compliance","evidence":{"ref_index":71,"verdict_class":"incontrovertible","resolved_title":null,"printed_excerpt":"10.1007/s11242-","reconstructed_doi":"10.1007/s11242-018-1077-3"},"severity":"advisory","ref_index":71,"audited_at":"2026-08-01T14:59:28.159630Z","event_type":"pith.integrity.v1","detected_doi":"10.1007/s11242-018-1077-3","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"b604ca77d501672a71668621a53a025bd6b145f615a02daf036aab7f8756b370","paper_version":1,"verdict_class":"incontrovertible","resolved_title":null,"detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":16021,"payload_sha256":"6085f70b88cd182d04f52e183c77f94f4a813954ef289807e815aa049c50631c","signature_b64":"b48XcszSGhyX/3iG1PfXTIkPCGvt5DTJmoPVLj+8U8Ou6jxitjlXqr8XlbtQ44j/LFPjCETWjgWkNpBkOrk3Ag==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T15:03:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qbjrz4c8Z89iChoMTzMsNoSb8+v4CS9zSPQDWyNT8sCIU4002yjNHSuHNQ8ndkG83ilhxaAUMFZalLLJ7lgNCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:15:45.044893Z"},"content_sha256":"758b3825e803502d80b4e1b5931644a000d1537657e41625185e01e9c96433ff","schema_version":"1.0","event_id":"sha256:758b3825e803502d80b4e1b5931644a000d1537657e41625185e01e9c96433ff"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","target":"integrity","payload":{"note":"DOI is split by whitespace or line breaks in the printed bibliography. Reconstructed DOI 10.1016/j.fluid.2017.05.007 resolves to 'Peng-Robinson equation of state: 40 years through cubics'. A reader following the printed text alone cannot reach it.","snippet":"Juan Sebastian Lopez-Echeverry, Simon Reif-Acherman, and Eduard Araujo-Lopez. “Peng-Robinson equation of state: 40 years through cubics” . In:Fluid Phase Equilib.447 (2017), pp. 39–71.doi:10.1016/j.fluid.2017.05. 007","arxiv_id":"2607.18608","detector":"doi_compliance","evidence":{"ref_index":62,"verdict_class":"incontrovertible","resolved_title":"Peng-Robinson equation of state: 40 years through cubics","printed_excerpt":"10.1016/j.fluid.2017.05","reconstructed_doi":"10.1016/j.fluid.2017.05.007"},"severity":"advisory","ref_index":62,"audited_at":"2026-08-01T14:59:28.159630Z","event_type":"pith.integrity.v1","detected_doi":"10.1016/j.fluid.2017.05.007","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"173d770faadc4dadba226ef93acac623a89094c6d47dbda81db8877c06002b44","paper_version":1,"verdict_class":"incontrovertible","resolved_title":"Peng-Robinson equation of state: 40 years through cubics","detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":16020,"payload_sha256":"ff9d03128af7366b2de77ac09c101498462d4f0bc4d17bec6ef435e954ef4eeb","signature_b64":"FriYaAax5W9inFG3X/txHtRUgbWDGjiJKvlfkpoKXMCk2xbQ+0IbFHtD7XdYrPnEHqn8uq24T8/8Pze7EYTOCw==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T15:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vQMOgDIS0qsM1QJEqnw1XyxpdHMeHtIZ/Hui9CoAjkM+fveSuYQ1lyMswAZBctwl0itv15mpuvRbYGbDA0pqBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:15:45.045170Z"},"content_sha256":"3bdbbdd5b9ef49235a70609d29e1243b9e69ebc44e6bce27280889387a05be78","schema_version":"1.0","event_id":"sha256:3bdbbdd5b9ef49235a70609d29e1243b9e69ebc44e6bce27280889387a05be78"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","target":"integrity","payload":{"note":"DOI is split by whitespace or line breaks in the printed bibliography. Reconstructed DOI 10.1016/j.ijrmms.2009.04.010 resolves to 'An effective thermal conductivity model of geological porous media for coupled thermo-hydro-mechanical systems with mult'. A reader following the printed text alone cannot reach it.","snippet":"Fuguo Tong, Lanru Jing, and Robert W. Zimmerman. “An effective thermal conductivity model of geological porous media for coupled thermo-hydro-mechanical systems with multiphase flow” . In:International Journal of Rock Mechanics and Mining S","arxiv_id":"2607.18608","detector":"doi_compliance","evidence":{"ref_index":60,"verdict_class":"incontrovertible","resolved_title":"An effective thermal conductivity model of geological porous media for coupled thermo-hydro-mechanical systems with multiphase flow","printed_excerpt":"10.1016/j.ijrmms","reconstructed_doi":"10.1016/j.ijrmms.2009.04.010"},"severity":"advisory","ref_index":60,"audited_at":"2026-08-01T14:59:28.159630Z","event_type":"pith.integrity.v1","detected_doi":"10.1016/j.ijrmms.2009.04.010","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"c7b6402489facc849ec9c5fc66a6325ee2af865bc319666bcaa9ab563aee779e","paper_version":1,"verdict_class":"incontrovertible","resolved_title":"An effective thermal conductivity model of geological porous media for coupled thermo-hydro-mechanical systems with multiphase flow","detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":16019,"payload_sha256":"dec9946507686fd0d0e48abeeee3fbe80ae684c395f431f193866fcf4738d1a4","signature_b64":"U/Wh7FKPMLR/w/jVOWM8iyxtVxI0nWOll3+o5XXuI+1XLXYLQpaJY3V2JD2iZifEAk9FJaeuSyN2jod9tR1JCg==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T15:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"np2oGMsA2VzU/K3LYmZ6SZBuvtjES/PKLSfIDbSzeY6/EPLibiG5hjUkjLsylOvjmeSBt8cjaSjO1mKUSp55Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:15:45.045466Z"},"content_sha256":"b00664773552f740e6a58762484c7a362fbfda0859e41106084d38a2e35e08a7","schema_version":"1.0","event_id":"sha256:b00664773552f740e6a58762484c7a362fbfda0859e41106084d38a2e35e08a7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HWJND6ETP6SLIXR2OF6M4S7GJR/bundle.json","state_url":"https://pith.science/pith/HWJND6ETP6SLIXR2OF6M4S7GJR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HWJND6ETP6SLIXR2OF6M4S7GJR/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":"2026-08-23T14:15:45Z","links":{"resolver":"https://pith.science/pith/HWJND6ETP6SLIXR2OF6M4S7GJR","bundle":"https://pith.science/pith/HWJND6ETP6SLIXR2OF6M4S7GJR/bundle.json","state":"https://pith.science/pith/HWJND6ETP6SLIXR2OF6M4S7GJR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HWJND6ETP6SLIXR2OF6M4S7GJR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:HWJND6ETP6SLIXR2OF6M4S7GJR","merge_version":"pith-open-graph-merge-v1","event_count":7,"valid_event_count":7,"invalid_event_count":0,"equivocation_count":1,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"7e166aaf3fdb3858e2c7b3bc8a99d7577a2b0775c2d89f58bb9f5677dbc483b9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.comp-ph","submitted_at":"2026-07-21T01:02:08Z","title_canon_sha256":"c14963f04d6dbec88fc165f3337fbedf92845968066f3307e63b1ee5bb3640a8"},"schema_version":"1.0","source":{"id":"2607.18608","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.18608","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"arxiv_version","alias_value":"2607.18608v1","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.18608","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"pith_short_12","alias_value":"HWJND6ETP6SL","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"pith_short_16","alias_value":"HWJND6ETP6SLIXR2","created_at":"2026-07-22T00:22:56Z"},{"alias_kind":"pith_short_8","alias_value":"HWJND6ET","created_at":"2026-07-22T00:22:56Z"}],"graph_snapshots":[{"event_id":"sha256:6acca0130ea9724cd0020288d417db7994c4d1cd64b6601e4e277dedfc7f492d","target":"graph","created_at":"2026-07-22T00:22:56Z","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/2607.18608/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Rapid pore-volume changes can trigger phase change on timescales shorter than characteristic transport times and may therefore be skipped by conventional nonlinear solves and adaptive time stepping. We present a persistent-variable framework for transport in fractured porous media, introducing specific volume as an independent variable. Starting from a fully coupled system, we derive volume-based models and recover classical pressure-based formulations by eliminating local thermodynamic variables. To resolve abrupt fracture opening, we introduce a nonlinear preconditioner that assumes instanta","authors_text":"Eirik Keilegavlen, Inga Berre, Veljko Lipovac","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.comp-ph","submitted_at":"2026-07-21T01:02:08Z","title":"Isochoric thermodynamic preconditioning for resolving mechanically induced phase change in fractured porous media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.18608","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":"sha256:6fb5e1b3c43d94dbbbc0255b9ce699d9f409c2a732af12b4cd3924a1c11527a3","target":"record","created_at":"2026-07-22T00:22:56Z","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":"7e166aaf3fdb3858e2c7b3bc8a99d7577a2b0775c2d89f58bb9f5677dbc483b9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.comp-ph","submitted_at":"2026-07-21T01:02:08Z","title_canon_sha256":"c14963f04d6dbec88fc165f3337fbedf92845968066f3307e63b1ee5bb3640a8"},"schema_version":"1.0","source":{"id":"2607.18608","kind":"arxiv","version":1}},"canonical_sha256":"3d92d1f8937fa4b45e3a717cce4be64c49c2ec5c0eda0030639c1356f1680ed0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3d92d1f8937fa4b45e3a717cce4be64c49c2ec5c0eda0030639c1356f1680ed0","first_computed_at":"2026-07-22T00:22:56.483562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-22T00:22:56.483562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J7saw0QQSDTCe4Yqdsz1mqPCMVUX85X2VYAJ7pk1clcRT79uZCYatm/wuRu9W2FzjRLGuIYuKxzy/Kf39EkIAQ==","signature_status":"signed_v1","signed_at":"2026-07-22T00:22:56.484384Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.18608","source_kind":"arxiv","source_version":1}}},"equivocations":[{"signer_id":"pith.science","event_type":"integrity_finding","target":"integrity","event_ids":["sha256:2c575689338bf5c34af39c28f54e0843abbc5e2ff90ee9a9aed90fab85ff4061","sha256:3bdbbdd5b9ef49235a70609d29e1243b9e69ebc44e6bce27280889387a05be78","sha256:758b3825e803502d80b4e1b5931644a000d1537657e41625185e01e9c96433ff","sha256:8cf2e92d373c93034983a3035f24eff023d4ec27a2cd9946925670844dae93f7","sha256:b00664773552f740e6a58762484c7a362fbfda0859e41106084d38a2e35e08a7"]}],"invalid_events":[],"applied_event_ids":["sha256:6fb5e1b3c43d94dbbbc0255b9ce699d9f409c2a732af12b4cd3924a1c11527a3","sha256:6acca0130ea9724cd0020288d417db7994c4d1cd64b6601e4e277dedfc7f492d"],"state_sha256":"e5a174d29b808fcba74a84aa4a8500cf2dff05760de0553cd888f4529efbcf58"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q7NDKOSakTCbHI0gF/KxP8XqNNrGh9c5pYqaRmt2Z83FNrWwcbcNi301RhaEn2lXP4ojzEQNULEIhtbAR97TBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T14:15:45.048135Z","bundle_sha256":"23c973afa46c2721021508e915b00914984607e5eb849e414fccd192bfb24108"}}