{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:ZEICT5JZC7HKB4ECADFEQFZIRB","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":"8759753dad6269ce9cc56e4710cea702260bf11d2c6fa9c5633a266ebafacd43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2010-09-17T19:52:39Z","title_canon_sha256":"f6c9ded119e4e12060895cbab8241c197146b2b5f855807b3dcb1078a42a4cd5"},"schema_version":"1.0","source":{"id":"1009.3492","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.3492","created_at":"2026-05-18T04:10:23Z"},{"alias_kind":"arxiv_version","alias_value":"1009.3492v2","created_at":"2026-05-18T04:10:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.3492","created_at":"2026-05-18T04:10:23Z"},{"alias_kind":"pith_short_12","alias_value":"ZEICT5JZC7HK","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"ZEICT5JZC7HKB4EC","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"ZEICT5JZ","created_at":"2026-05-18T12:26:17Z"}],"graph_snapshots":[{"event_id":"sha256:4229f8a3c675a3761aada5dbe81e1765ce5ea5a253029b0b877a1d9f8d2252fa","target":"graph","created_at":"2026-05-18T04:10:23Z","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":"We report on the erosion of flat linoleum \"pebbles\" under steady rotation in a slurry of abrasive grit. To quantify shape as a function of time, we develop a general method in which the pebble is photographed from multiple angles with respect to the grid of pixels in a digital camera. This reduces digitization noise, and allows the local curvature of the contour to be computed with a controllable degree of uncertainty. Several shape descriptors are then employed to follow the evolution of different initial shapes toward a circle, where abrasion halts. The results are in good quantitative agree","authors_text":"A. E. Roth, C. M. Marques, D. J. Durian","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2010-09-17T19:52:39Z","title":"Abrasion of flat rotating shapes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.3492","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:a5e9c9f68704fe698082e494676ca6fad400b4d6b8328b0fb599b5313b4de94a","target":"record","created_at":"2026-05-18T04:10:23Z","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":"8759753dad6269ce9cc56e4710cea702260bf11d2c6fa9c5633a266ebafacd43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2010-09-17T19:52:39Z","title_canon_sha256":"f6c9ded119e4e12060895cbab8241c197146b2b5f855807b3dcb1078a42a4cd5"},"schema_version":"1.0","source":{"id":"1009.3492","kind":"arxiv","version":2}},"canonical_sha256":"c91029f53917cea0f08200ca4817288841bf7b0ecaf13752c430f6a51a13d30e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c91029f53917cea0f08200ca4817288841bf7b0ecaf13752c430f6a51a13d30e","first_computed_at":"2026-05-18T04:10:23.703087Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:10:23.703087Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3RSmYGYM2CNKBAejPSUTD+I08aIqboST6s7TrQyBqhb8hk2e1jyrS5mtGwzcg6Z9bFxqLZus3jTgN0i4Bp7LDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:10:23.703771Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.3492","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5e9c9f68704fe698082e494676ca6fad400b4d6b8328b0fb599b5313b4de94a","sha256:4229f8a3c675a3761aada5dbe81e1765ce5ea5a253029b0b877a1d9f8d2252fa"],"state_sha256":"2b3802b191da64b4579602c26b1e5803fd6795b8bfcfefe1b7cd433dd4b9eee7"}