{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:KLPZ4XDK5HPLIOASDNDAHZ3NM6","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":"5724d583e4918624741a63149ab59eb3f8c4e50502f64c7631dca7ed6785e22f","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2018-01-03T11:43:12Z","title_canon_sha256":"e7cbc0ee3867f02f34e0ab7a38b2ad0898333770a8f764d99f973704a6d32bc2"},"schema_version":"1.0","source":{"id":"1801.00964","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.00964","created_at":"2026-05-18T00:13:04Z"},{"alias_kind":"arxiv_version","alias_value":"1801.00964v2","created_at":"2026-05-18T00:13:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.00964","created_at":"2026-05-18T00:13:04Z"},{"alias_kind":"pith_short_12","alias_value":"KLPZ4XDK5HPL","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KLPZ4XDK5HPLIOAS","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KLPZ4XDK","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:906dc0d66f25ab11f0fb77dc96ddc0bb389a6d86e0f4c2d0d85143367f003727","target":"graph","created_at":"2026-05-18T00:13:04Z","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":"Plants have developed different tropisms: in particular, they re-orient the growth of their branches towards light (phototropism) or upwards (gravitropism). How these tropisms affect the shape of a tree crown remains unanswered. We address this question by developing a propagating front model of tree growth. This model being length-free, it leads to self-similar solutions, independent of the initial conditions, at long time. Varying the intensities of each tropism, different self-similar shapes emerge, including singular ones. Interestingly, these shapes bear similarities with existing tree sp","authors_text":"B. Moulia, C. Eloy, E. Badel, L. Duchemin","cross_cats":["cond-mat.soft"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2018-01-03T11:43:12Z","title":"Tree crowns grow into self-similar shapes controlled by gravity and light sensing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.00964","kind":"arxiv","version":2},"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":"sha256:32e572be7a810a0bf436ee3a4ae7c5f72810735f6ebd82c302a457af4c946d9a","target":"record","created_at":"2026-05-18T00:13:04Z","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":"5724d583e4918624741a63149ab59eb3f8c4e50502f64c7631dca7ed6785e22f","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2018-01-03T11:43:12Z","title_canon_sha256":"e7cbc0ee3867f02f34e0ab7a38b2ad0898333770a8f764d99f973704a6d32bc2"},"schema_version":"1.0","source":{"id":"1801.00964","kind":"arxiv","version":2}},"canonical_sha256":"52df9e5c6ae9deb438121b4603e76d678af7a3a12b97b188f6e0efdb80d6e52b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52df9e5c6ae9deb438121b4603e76d678af7a3a12b97b188f6e0efdb80d6e52b","first_computed_at":"2026-05-18T00:13:04.846595Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:13:04.846595Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7ySID9F1TMmCDuaR6OQrTXQxfJz7sK8Peb7dFgjSRwUpUZsalSOes7Lp5RpEQt4mmBrB/55GLP3LBnRtHp7JCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:13:04.847289Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.00964","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:32e572be7a810a0bf436ee3a4ae7c5f72810735f6ebd82c302a457af4c946d9a","sha256:906dc0d66f25ab11f0fb77dc96ddc0bb389a6d86e0f4c2d0d85143367f003727"],"state_sha256":"5b553f6d27a450b931f454040e2680635a917a48b60b7919c8f59b2940d7a61b"}