{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:V5FROYWSX4ECTD5TAUIH5A6TJ7","short_pith_number":"pith:V5FROYWS","canonical_record":{"source":{"id":"2504.13411","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-18T02:13:14Z","cross_cats_sorted":[],"title_canon_sha256":"e4c10498f9da51129b3724adc96a360ddb47036068868bacc2b3a0fc6df7e838","abstract_canon_sha256":"ea59c3207e385daef41fb72157860cb2d7d3974b20092ea46d49ed797deb9117"},"schema_version":"1.0"},"canonical_sha256":"af4b1762d2bf08298fb305107e83d34fe0fad68e18a1b75f994cd92b2d8038cd","source":{"kind":"arxiv","id":"2504.13411","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.13411","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"arxiv_version","alias_value":"2504.13411v1","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.13411","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"pith_short_12","alias_value":"V5FROYWSX4EC","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"pith_short_16","alias_value":"V5FROYWSX4ECTD5T","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"pith_short_8","alias_value":"V5FROYWS","created_at":"2026-07-05T10:50:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:V5FROYWSX4ECTD5TAUIH5A6TJ7","target":"record","payload":{"canonical_record":{"source":{"id":"2504.13411","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-18T02:13:14Z","cross_cats_sorted":[],"title_canon_sha256":"e4c10498f9da51129b3724adc96a360ddb47036068868bacc2b3a0fc6df7e838","abstract_canon_sha256":"ea59c3207e385daef41fb72157860cb2d7d3974b20092ea46d49ed797deb9117"},"schema_version":"1.0"},"canonical_sha256":"af4b1762d2bf08298fb305107e83d34fe0fad68e18a1b75f994cd92b2d8038cd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:50:54.488774Z","signature_b64":"WZIscfIu+QRCze3ODn3NPdtrU5zOFvAq3M9mrTGSC3nEYZztyaGQ+9LdqaKypWyEvjjX59moUEOHxFLOzH8iAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"af4b1762d2bf08298fb305107e83d34fe0fad68e18a1b75f994cd92b2d8038cd","last_reissued_at":"2026-07-05T10:50:54.488286Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:50:54.488286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.13411","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":"2026-07-05T10:50:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LxC++WKhRwpVxKaIojnSutCiJEMbaern0yyqr0uEqwZeQ5QXwz+Ob8FS8RVxq1IB9qyP4toyYvW0rs6ZwuxYBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T07:03:58.043112Z"},"content_sha256":"4b33a8bb8cf7e775f1b881a0b763013c6243d6a8095db25fbb438acce8d4ae49","schema_version":"1.0","event_id":"sha256:4b33a8bb8cf7e775f1b881a0b763013c6243d6a8095db25fbb438acce8d4ae49"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:V5FROYWSX4ECTD5TAUIH5A6TJ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Local Ridge Formation and Domain Delimitation in Aggregation-Diffusion Equations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.bio-ph","authors_text":"Shin Nishihara, Toru Ohira","submitted_at":"2025-04-18T02:13:14Z","abstract_excerpt":"On the carapace of turtles such as Mauremys japonica, raised linear structures called keels form along the midline during embryonic development. This study investigates the underlying mechanisms of keel formation and domain delimitation on the carapace using a theoretical framework based on aggregation-diffusion equations. In this model, outward tissue growth is represented by density-dependent diffusion, while local ridge formation is modeled as distance-dependent aggregation potentially driven by haptotaxis. Analytical and numerical investigations reveal that distance sensitivity in aggregat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.13411","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/2504.13411/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":"2026-07-05T10:50:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Zr7sfSgLXI6QYU/5x3wicN8wP8Ws6QgvZBUw+9Qse4GHiAx2c6lBkwvcE0qJICHhBAUHrVAEv/bRzE9lPC0+AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T07:03:58.043649Z"},"content_sha256":"c4d091e48227d2071355c7c1c18dff08510d3e7df9071c91bba03c5235219dd2","schema_version":"1.0","event_id":"sha256:c4d091e48227d2071355c7c1c18dff08510d3e7df9071c91bba03c5235219dd2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V5FROYWSX4ECTD5TAUIH5A6TJ7/bundle.json","state_url":"https://pith.science/pith/V5FROYWSX4ECTD5TAUIH5A6TJ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V5FROYWSX4ECTD5TAUIH5A6TJ7/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":"2026-08-23T07:03:58Z","links":{"resolver":"https://pith.science/pith/V5FROYWSX4ECTD5TAUIH5A6TJ7","bundle":"https://pith.science/pith/V5FROYWSX4ECTD5TAUIH5A6TJ7/bundle.json","state":"https://pith.science/pith/V5FROYWSX4ECTD5TAUIH5A6TJ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V5FROYWSX4ECTD5TAUIH5A6TJ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:V5FROYWSX4ECTD5TAUIH5A6TJ7","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":"ea59c3207e385daef41fb72157860cb2d7d3974b20092ea46d49ed797deb9117","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-18T02:13:14Z","title_canon_sha256":"e4c10498f9da51129b3724adc96a360ddb47036068868bacc2b3a0fc6df7e838"},"schema_version":"1.0","source":{"id":"2504.13411","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.13411","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"arxiv_version","alias_value":"2504.13411v1","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.13411","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"pith_short_12","alias_value":"V5FROYWSX4EC","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"pith_short_16","alias_value":"V5FROYWSX4ECTD5T","created_at":"2026-07-05T10:50:54Z"},{"alias_kind":"pith_short_8","alias_value":"V5FROYWS","created_at":"2026-07-05T10:50:54Z"}],"graph_snapshots":[{"event_id":"sha256:c4d091e48227d2071355c7c1c18dff08510d3e7df9071c91bba03c5235219dd2","target":"graph","created_at":"2026-07-05T10:50:54Z","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/2504.13411/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"On the carapace of turtles such as Mauremys japonica, raised linear structures called keels form along the midline during embryonic development. This study investigates the underlying mechanisms of keel formation and domain delimitation on the carapace using a theoretical framework based on aggregation-diffusion equations. In this model, outward tissue growth is represented by density-dependent diffusion, while local ridge formation is modeled as distance-dependent aggregation potentially driven by haptotaxis. Analytical and numerical investigations reveal that distance sensitivity in aggregat","authors_text":"Shin Nishihara, Toru Ohira","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-18T02:13:14Z","title":"Local Ridge Formation and Domain Delimitation in Aggregation-Diffusion Equations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.13411","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":"sha256:4b33a8bb8cf7e775f1b881a0b763013c6243d6a8095db25fbb438acce8d4ae49","target":"record","created_at":"2026-07-05T10:50:54Z","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":"ea59c3207e385daef41fb72157860cb2d7d3974b20092ea46d49ed797deb9117","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2025-04-18T02:13:14Z","title_canon_sha256":"e4c10498f9da51129b3724adc96a360ddb47036068868bacc2b3a0fc6df7e838"},"schema_version":"1.0","source":{"id":"2504.13411","kind":"arxiv","version":1}},"canonical_sha256":"af4b1762d2bf08298fb305107e83d34fe0fad68e18a1b75f994cd92b2d8038cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af4b1762d2bf08298fb305107e83d34fe0fad68e18a1b75f994cd92b2d8038cd","first_computed_at":"2026-07-05T10:50:54.488286Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:50:54.488286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WZIscfIu+QRCze3ODn3NPdtrU5zOFvAq3M9mrTGSC3nEYZztyaGQ+9LdqaKypWyEvjjX59moUEOHxFLOzH8iAg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:50:54.488774Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.13411","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4b33a8bb8cf7e775f1b881a0b763013c6243d6a8095db25fbb438acce8d4ae49","sha256:c4d091e48227d2071355c7c1c18dff08510d3e7df9071c91bba03c5235219dd2"],"state_sha256":"9808e0ddb5deaa951891de5785133cdd8516476cc02a62e3543a98593e7bdab4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sUn5cw6pvbnoK+9e9vltCa5w5qeZIXU56F5XDvNHi3YAaG0cqa42oiWToDaX9jIm8NAYoZ4oc6oDltfc803CAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T07:03:58.048435Z","bundle_sha256":"b935c8e0953af684ccc4f25bb263a172fa67cc52c7f4f5d32ee2a980d89e0f61"}}