{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:7B4NYABMFTC7TZ7T6SJUPA7UKO","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":"ca206b90fe02a38ee73c13e058e58dbe85e7082225c9d7193759535f8ad86b69","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"2002-04-25T11:40:34Z","title_canon_sha256":"22eadf927e95454988a1ff6cb6be4b0de733fe532de5017409d4cd0ccdbc0185"},"schema_version":"1.0","source":{"id":"cond-mat/0204551","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0204551","created_at":"2026-05-18T01:06:59Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0204551v1","created_at":"2026-05-18T01:06:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0204551","created_at":"2026-05-18T01:06:59Z"},{"alias_kind":"pith_short_12","alias_value":"7B4NYABMFTC7","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"7B4NYABMFTC7TZ7T","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"7B4NYABM","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:9c7331c191e5f81e3d4d4bbbe3c8e9b8c96eb24bdd73c478de750a7cb5f9ab8a","target":"graph","created_at":"2026-05-18T01:06:59Z","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 study the spreading kinetics of a monolayer of hard-core particles on a semi-infinite, chemically heterogeneous solid substrate, one side of which is coupled to a particle reservoir. The substrate is modeled as a square lattice containing two types of sites -- ordinary ones and special, chemically active sites placed at random positions with mean concentration $\\alpha$. These special sites temporarily immobilize particles of the monolayer which then serve as impenetrable obstacles for the other particles. In terms of a mean-field-type theory, we show that the mean displacement $X_0(t)$ of t","authors_text":"Bulgaria; (2) LPTL, France), G. Oshanin (2) ((1) Institute of Mechanics -BAS, N. Pesheva (1), Paris, Sofia, University of Paris 6","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"2002-04-25T11:40:34Z","title":"Monolayer Spreading on a Chemically Heterogeneous Substrate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0204551","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:ce7e47b51d2c77cb25df329ef1ecf657660468f93074bb50146be67c7c8124c0","target":"record","created_at":"2026-05-18T01:06:59Z","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":"ca206b90fe02a38ee73c13e058e58dbe85e7082225c9d7193759535f8ad86b69","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"2002-04-25T11:40:34Z","title_canon_sha256":"22eadf927e95454988a1ff6cb6be4b0de733fe532de5017409d4cd0ccdbc0185"},"schema_version":"1.0","source":{"id":"cond-mat/0204551","kind":"arxiv","version":1}},"canonical_sha256":"f878dc002c2cc5f9e7f3f4934783f4538e127026bd4922ed13dc179d032a32ad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f878dc002c2cc5f9e7f3f4934783f4538e127026bd4922ed13dc179d032a32ad","first_computed_at":"2026-05-18T01:06:59.663872Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:06:59.663872Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aChlZZqRarPRGaN+3+NetQTuldw6665caZB2ikPR3mkTf3FYtYWqfB+3cbzh0Iiu4FFj6fftu+g4TlptSx60DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:06:59.664497Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0204551","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce7e47b51d2c77cb25df329ef1ecf657660468f93074bb50146be67c7c8124c0","sha256:9c7331c191e5f81e3d4d4bbbe3c8e9b8c96eb24bdd73c478de750a7cb5f9ab8a"],"state_sha256":"d82dfdc54bfc8c0110200babb387a076498647fbaf5b79b65495ea9c20538320"}