{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:AHKOV7HOGPZSSF5YAV7Y6EM3RY","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":"d1572b338ac837be50bd747b01663f4934bc8f3c1ef04127833beae7ef480266","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"2002-12-30T21:44:17Z","title_canon_sha256":"f62f33e313039985ca51c8aea714dffa07cd270964d1b1e3561d997742b092f6"},"schema_version":"1.0","source":{"id":"cond-mat/0212638","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0212638","created_at":"2026-05-18T01:40:02Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0212638v1","created_at":"2026-05-18T01:40:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0212638","created_at":"2026-05-18T01:40:02Z"},{"alias_kind":"pith_short_12","alias_value":"AHKOV7HOGPZS","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"AHKOV7HOGPZSSF5Y","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"AHKOV7HO","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:2b0488c0fee4c41096aef36284bb198d06d7413727e784a6d30948227a0c45f6","target":"graph","created_at":"2026-05-18T01:40:02Z","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 numerically and theoretically (on a heuristic level) the time evolution of a gas confined to a cube of size $L^3$ divided into two parts by a piston with mass $M_L \\sim L^2$ which can only move in the $x$-direction. Starting with a uniform ``double-peaked'' (non Maxwellian) distribution of the gas and a stationary piston, we find that (a) after an initial quiescent period the system becomes unstable and the piston performs a damped oscillatory motion, and (b) there is a thermalization of the system leading to a Maxwellian distribution of the gas velocities. The time of the onset of th","authors_text":"J. L. Lebowitz, N. Chernov","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"2002-12-30T21:44:17Z","title":"Dynamics of a Massive Piston in an Ideal Gas: Oscillatory Motion and Approach to Equilibrium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0212638","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:c9b98de4559664ed242515d04ff11821d2b067b4d934245c93832821ee7ab0be","target":"record","created_at":"2026-05-18T01:40:02Z","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":"d1572b338ac837be50bd747b01663f4934bc8f3c1ef04127833beae7ef480266","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"2002-12-30T21:44:17Z","title_canon_sha256":"f62f33e313039985ca51c8aea714dffa07cd270964d1b1e3561d997742b092f6"},"schema_version":"1.0","source":{"id":"cond-mat/0212638","kind":"arxiv","version":1}},"canonical_sha256":"01d4eafcee33f32917b8057f8f119b8e2a336c0c6577118a0046a1131c8819f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01d4eafcee33f32917b8057f8f119b8e2a336c0c6577118a0046a1131c8819f1","first_computed_at":"2026-05-18T01:40:02.184829Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:02.184829Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uvWstKEdd822ks+qBJOambdlHIU3MGJLNXVdcciwp9XQwFEZ13oFcP2ysNs1UA6+qFmDqpIfVD/1K+zgOtuaBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:02.185477Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0212638","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c9b98de4559664ed242515d04ff11821d2b067b4d934245c93832821ee7ab0be","sha256:2b0488c0fee4c41096aef36284bb198d06d7413727e784a6d30948227a0c45f6"],"state_sha256":"a92bfc44a3c70c18b3270db5dff3a3172ba34f4e26b065ae17cc9a85724ef9b5"}