{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:677LZLV25PM6Y77MVG3ZQOUNFK","short_pith_number":"pith:677LZLV2","canonical_record":{"source":{"id":"1206.3524","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2012-06-15T17:33:32Z","cross_cats_sorted":[],"title_canon_sha256":"5bfa087b799d7e8b0f3055c570bb7d1b2be08aa2b42ecefa00ff7784c0c24176","abstract_canon_sha256":"a3c618391750984cc3279e6282954fc1423cde533e2569997661f3410165f3d0"},"schema_version":"1.0"},"canonical_sha256":"f7febcaebaebd9ec7feca9b7983a8d2aba7f99fae42869f45f864b7166030fa3","source":{"kind":"arxiv","id":"1206.3524","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.3524","created_at":"2026-05-18T01:56:52Z"},{"alias_kind":"arxiv_version","alias_value":"1206.3524v2","created_at":"2026-05-18T01:56:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.3524","created_at":"2026-05-18T01:56:52Z"},{"alias_kind":"pith_short_12","alias_value":"677LZLV25PM6","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"677LZLV25PM6Y77M","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"677LZLV2","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:677LZLV25PM6Y77MVG3ZQOUNFK","target":"record","payload":{"canonical_record":{"source":{"id":"1206.3524","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2012-06-15T17:33:32Z","cross_cats_sorted":[],"title_canon_sha256":"5bfa087b799d7e8b0f3055c570bb7d1b2be08aa2b42ecefa00ff7784c0c24176","abstract_canon_sha256":"a3c618391750984cc3279e6282954fc1423cde533e2569997661f3410165f3d0"},"schema_version":"1.0"},"canonical_sha256":"f7febcaebaebd9ec7feca9b7983a8d2aba7f99fae42869f45f864b7166030fa3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:52.506403Z","signature_b64":"XdpcqOzWzr4qZyaT/6q3MLTfHGyjpcS5q3hVKdPnwirmyzxGelRgvDyjlFtEqW583QNeRA0VEQzUuWHcu+b4CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7febcaebaebd9ec7feca9b7983a8d2aba7f99fae42869f45f864b7166030fa3","last_reissued_at":"2026-05-18T01:56:52.505885Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:52.505885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.3524","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:56:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b1ZCcypZwqSgdq6FdxhMkaiSNDne8tCNZI1Bn/5yd4xOsF/NFy7+JdH5zyNwgtBTaDzA+62Qpnq7zB7QNqFbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T13:37:19.701639Z"},"content_sha256":"c229b8b1f404d3da09fa547ee2302e5488bd56448e240fcdfe1c107c041b4b36","schema_version":"1.0","event_id":"sha256:c229b8b1f404d3da09fa547ee2302e5488bd56448e240fcdfe1c107c041b4b36"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:677LZLV25PM6Y77MVG3ZQOUNFK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A one-dimensional Fermi accelerator model with moving wall described by a nonlinear van der Pol oscillator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nlin.CD","authors_text":"Edson Denis Leonel, Tiago Botari","submitted_at":"2012-06-15T17:33:32Z","abstract_excerpt":"A modification of the one-dimensional Fermi accelerator model is considered in this work. The dynamics of a classical particle of mass $m$, confined to bounce elastically between two rigid walls where one is described by a non-linear van der Pol type oscillator while the other one is fixed, working as a re-injection mechanism of the particle for a next collision, is carefully made by the use of a two-dimensional non-linear mapping. Two cases are considered: (i) the situation where the particle has mass negligible as compared to the mass of the moving wall and does not affect the motion of it; "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.3524","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T01:56:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kv7GL0D2bIe+L56bvpXnjxdbolpQoCW0p0xyN/TQhF/0G0rTpWvqptFyJmbuyIYA04cFcTPPlK8AvlvqFxyVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T13:37:19.702193Z"},"content_sha256":"ec65ba2ead2e8a93f6d65c6bcaa0783669041e7bdbe8104b243f86d37b9b4a16","schema_version":"1.0","event_id":"sha256:ec65ba2ead2e8a93f6d65c6bcaa0783669041e7bdbe8104b243f86d37b9b4a16"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/677LZLV25PM6Y77MVG3ZQOUNFK/bundle.json","state_url":"https://pith.science/pith/677LZLV25PM6Y77MVG3ZQOUNFK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/677LZLV25PM6Y77MVG3ZQOUNFK/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":"2026-05-21T13:37:19Z","links":{"resolver":"https://pith.science/pith/677LZLV25PM6Y77MVG3ZQOUNFK","bundle":"https://pith.science/pith/677LZLV25PM6Y77MVG3ZQOUNFK/bundle.json","state":"https://pith.science/pith/677LZLV25PM6Y77MVG3ZQOUNFK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/677LZLV25PM6Y77MVG3ZQOUNFK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:677LZLV25PM6Y77MVG3ZQOUNFK","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":"a3c618391750984cc3279e6282954fc1423cde533e2569997661f3410165f3d0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2012-06-15T17:33:32Z","title_canon_sha256":"5bfa087b799d7e8b0f3055c570bb7d1b2be08aa2b42ecefa00ff7784c0c24176"},"schema_version":"1.0","source":{"id":"1206.3524","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.3524","created_at":"2026-05-18T01:56:52Z"},{"alias_kind":"arxiv_version","alias_value":"1206.3524v2","created_at":"2026-05-18T01:56:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.3524","created_at":"2026-05-18T01:56:52Z"},{"alias_kind":"pith_short_12","alias_value":"677LZLV25PM6","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"677LZLV25PM6Y77M","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"677LZLV2","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:ec65ba2ead2e8a93f6d65c6bcaa0783669041e7bdbe8104b243f86d37b9b4a16","target":"graph","created_at":"2026-05-18T01:56:52Z","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":"A modification of the one-dimensional Fermi accelerator model is considered in this work. The dynamics of a classical particle of mass $m$, confined to bounce elastically between two rigid walls where one is described by a non-linear van der Pol type oscillator while the other one is fixed, working as a re-injection mechanism of the particle for a next collision, is carefully made by the use of a two-dimensional non-linear mapping. Two cases are considered: (i) the situation where the particle has mass negligible as compared to the mass of the moving wall and does not affect the motion of it; ","authors_text":"Edson Denis Leonel, Tiago Botari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2012-06-15T17:33:32Z","title":"A one-dimensional Fermi accelerator model with moving wall described by a nonlinear van der Pol oscillator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.3524","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:c229b8b1f404d3da09fa547ee2302e5488bd56448e240fcdfe1c107c041b4b36","target":"record","created_at":"2026-05-18T01:56:52Z","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":"a3c618391750984cc3279e6282954fc1423cde533e2569997661f3410165f3d0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2012-06-15T17:33:32Z","title_canon_sha256":"5bfa087b799d7e8b0f3055c570bb7d1b2be08aa2b42ecefa00ff7784c0c24176"},"schema_version":"1.0","source":{"id":"1206.3524","kind":"arxiv","version":2}},"canonical_sha256":"f7febcaebaebd9ec7feca9b7983a8d2aba7f99fae42869f45f864b7166030fa3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f7febcaebaebd9ec7feca9b7983a8d2aba7f99fae42869f45f864b7166030fa3","first_computed_at":"2026-05-18T01:56:52.505885Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:52.505885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XdpcqOzWzr4qZyaT/6q3MLTfHGyjpcS5q3hVKdPnwirmyzxGelRgvDyjlFtEqW583QNeRA0VEQzUuWHcu+b4CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:52.506403Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.3524","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c229b8b1f404d3da09fa547ee2302e5488bd56448e240fcdfe1c107c041b4b36","sha256:ec65ba2ead2e8a93f6d65c6bcaa0783669041e7bdbe8104b243f86d37b9b4a16"],"state_sha256":"fbc5860f19b240725c1820c801013f00ef4068ebd7954e7a35480c4db817c932"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ExWugOKht/jMdEwl1PoI+YIxU8b2QVw3QXx8KNK4PreAwYM0mvunYjofq1vnXj5i/ZokT9FW2+DRj/J7a/nyBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T13:37:19.705253Z","bundle_sha256":"5725cdcd44b5d440631f3641896d086fe33de6f7544d8b16552de310c34f90f8"}}