{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:7TRDHAF5EQRA5S6DKQZJLZHXCK","short_pith_number":"pith:7TRDHAF5","canonical_record":{"source":{"id":"2606.20352","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-18T15:18:01Z","cross_cats_sorted":[],"title_canon_sha256":"8ef67e6f0a6aa2ecbfe8dd8476aa137a91348762ccd16070061e113b532782fe","abstract_canon_sha256":"0a2827e88db316e9a9055e5aeb083ab1b96b820c1ef1afd00f7e29bd74a1e4ee"},"schema_version":"1.0"},"canonical_sha256":"fce23380bd24220ecbc3543295e4f7128781a9e8a7af534d75a8198a916e6d18","source":{"kind":"arxiv","id":"2606.20352","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.20352","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"arxiv_version","alias_value":"2606.20352v1","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.20352","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"pith_short_12","alias_value":"7TRDHAF5EQRA","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"pith_short_16","alias_value":"7TRDHAF5EQRA5S6D","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"pith_short_8","alias_value":"7TRDHAF5","created_at":"2026-06-19T16:13:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:7TRDHAF5EQRA5S6DKQZJLZHXCK","target":"record","payload":{"canonical_record":{"source":{"id":"2606.20352","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-18T15:18:01Z","cross_cats_sorted":[],"title_canon_sha256":"8ef67e6f0a6aa2ecbfe8dd8476aa137a91348762ccd16070061e113b532782fe","abstract_canon_sha256":"0a2827e88db316e9a9055e5aeb083ab1b96b820c1ef1afd00f7e29bd74a1e4ee"},"schema_version":"1.0"},"canonical_sha256":"fce23380bd24220ecbc3543295e4f7128781a9e8a7af534d75a8198a916e6d18","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:13:09.650573Z","signature_b64":"mCBjgtJTsM5t9EvsLE9RbfSjmk7BF6356cXzN4FWwhPLHjdqx1nDOAC+sCTp1T5yEaYJo6il2uOkcXgBj/DXDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fce23380bd24220ecbc3543295e4f7128781a9e8a7af534d75a8198a916e6d18","last_reissued_at":"2026-06-19T16:13:09.650212Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:13:09.650212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.20352","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":"2026-06-19T16:13:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ycg7Cb75CkP/jJ9UjpauSnFrvagneWCe5tAQhuxnkFC4MAV95h0E/0edaaxN5lHuc3JeDrlCT9MgLSi+0JnDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T10:08:45.029789Z"},"content_sha256":"8e3976c00b13480b68add4bf636f37139372c0c173a2d73fedda19debacd18fa","schema_version":"1.0","event_id":"sha256:8e3976c00b13480b68add4bf636f37139372c0c173a2d73fedda19debacd18fa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:7TRDHAF5EQRA5S6DKQZJLZHXCK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Planar Lagrangian transport and scalar-gradient organization in a turbulent reacting shear layer","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Joseph C. Oefelein, Sriram P. Kalathoor","submitted_at":"2026-06-18T15:18:01Z","abstract_excerpt":"We analyze planar Lagrangian transport and scalar-gradient organization in a supersonic, reacting hydrogen-air temporal mixing layer using time-resolved mid-plane data from a three-dimensional direct numerical simulation. The analysis combines forward/backward finite-time Lyapunov exponent (FTLE) fields, operational FTLE-ridge skeletons, Cauchy-Green deformation measures, shear-LCS metrics, and planar hyperbolic geodesic-LCS extraction to examine how finite-time stretching structures the reacting shear layer. The time-resolved FTLE ridges identify repelling and attracting finite-time transport"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.20352","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/2606.20352/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":"2026-06-19T16:13:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YCkc00tsblhUWhTu2/CTpaO38CSQhhuWCud/82x7nCRNWcp4rUTuPC/N6qTYXJvImkTQa8+fpBbsHBmAGZ6UCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T10:08:45.030167Z"},"content_sha256":"ac56035058a888e474817e903bc4ef91c602cf14bd9efd78fb29e98f6cd93058","schema_version":"1.0","event_id":"sha256:ac56035058a888e474817e903bc4ef91c602cf14bd9efd78fb29e98f6cd93058"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7TRDHAF5EQRA5S6DKQZJLZHXCK/bundle.json","state_url":"https://pith.science/pith/7TRDHAF5EQRA5S6DKQZJLZHXCK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7TRDHAF5EQRA5S6DKQZJLZHXCK/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":"2026-06-25T10:08:45Z","links":{"resolver":"https://pith.science/pith/7TRDHAF5EQRA5S6DKQZJLZHXCK","bundle":"https://pith.science/pith/7TRDHAF5EQRA5S6DKQZJLZHXCK/bundle.json","state":"https://pith.science/pith/7TRDHAF5EQRA5S6DKQZJLZHXCK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7TRDHAF5EQRA5S6DKQZJLZHXCK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:7TRDHAF5EQRA5S6DKQZJLZHXCK","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":"0a2827e88db316e9a9055e5aeb083ab1b96b820c1ef1afd00f7e29bd74a1e4ee","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-18T15:18:01Z","title_canon_sha256":"8ef67e6f0a6aa2ecbfe8dd8476aa137a91348762ccd16070061e113b532782fe"},"schema_version":"1.0","source":{"id":"2606.20352","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.20352","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"arxiv_version","alias_value":"2606.20352v1","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.20352","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"pith_short_12","alias_value":"7TRDHAF5EQRA","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"pith_short_16","alias_value":"7TRDHAF5EQRA5S6D","created_at":"2026-06-19T16:13:09Z"},{"alias_kind":"pith_short_8","alias_value":"7TRDHAF5","created_at":"2026-06-19T16:13:09Z"}],"graph_snapshots":[{"event_id":"sha256:ac56035058a888e474817e903bc4ef91c602cf14bd9efd78fb29e98f6cd93058","target":"graph","created_at":"2026-06-19T16:13:09Z","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/2606.20352/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We analyze planar Lagrangian transport and scalar-gradient organization in a supersonic, reacting hydrogen-air temporal mixing layer using time-resolved mid-plane data from a three-dimensional direct numerical simulation. The analysis combines forward/backward finite-time Lyapunov exponent (FTLE) fields, operational FTLE-ridge skeletons, Cauchy-Green deformation measures, shear-LCS metrics, and planar hyperbolic geodesic-LCS extraction to examine how finite-time stretching structures the reacting shear layer. The time-resolved FTLE ridges identify repelling and attracting finite-time transport","authors_text":"Joseph C. Oefelein, Sriram P. Kalathoor","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-18T15:18:01Z","title":"Planar Lagrangian transport and scalar-gradient organization in a turbulent reacting shear layer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.20352","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":"sha256:8e3976c00b13480b68add4bf636f37139372c0c173a2d73fedda19debacd18fa","target":"record","created_at":"2026-06-19T16:13:09Z","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":"0a2827e88db316e9a9055e5aeb083ab1b96b820c1ef1afd00f7e29bd74a1e4ee","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-18T15:18:01Z","title_canon_sha256":"8ef67e6f0a6aa2ecbfe8dd8476aa137a91348762ccd16070061e113b532782fe"},"schema_version":"1.0","source":{"id":"2606.20352","kind":"arxiv","version":1}},"canonical_sha256":"fce23380bd24220ecbc3543295e4f7128781a9e8a7af534d75a8198a916e6d18","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fce23380bd24220ecbc3543295e4f7128781a9e8a7af534d75a8198a916e6d18","first_computed_at":"2026-06-19T16:13:09.650212Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-19T16:13:09.650212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mCBjgtJTsM5t9EvsLE9RbfSjmk7BF6356cXzN4FWwhPLHjdqx1nDOAC+sCTp1T5yEaYJo6il2uOkcXgBj/DXDg==","signature_status":"signed_v1","signed_at":"2026-06-19T16:13:09.650573Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.20352","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e3976c00b13480b68add4bf636f37139372c0c173a2d73fedda19debacd18fa","sha256:ac56035058a888e474817e903bc4ef91c602cf14bd9efd78fb29e98f6cd93058"],"state_sha256":"2be1a666ad7d92c30ab58a45d2e17b0b1c55e7e8459063095167160fecb068fb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qfTuDXjaeGWpbq9MqOlPLoIUQB4RIRtVYM2mbcY7HCZEsc+Hjj2gioo2IG64M8jWD/bSWu19W3LTRhL0TF7EBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T10:08:45.032513Z","bundle_sha256":"147d6b50ef3b85d3dd51945162c97edf4e66619a73b854750809feb27bf1a672"}}