{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:4HMFX66PRWEX2FKYULWBRCQ6VE","short_pith_number":"pith:4HMFX66P","canonical_record":{"source":{"id":"1407.0645","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2014-07-02T16:53:04Z","cross_cats_sorted":["cs.FL"],"title_canon_sha256":"5616a238cadbcd0e7fb9f1bbfec86c21ff7ef1188cd4fff87294ab455eca8a8f","abstract_canon_sha256":"e77be5a4cad9bc857d51140f5ca0fce5c81a5f3dceb64d19ff59020e0f9e5125"},"schema_version":"1.0"},"canonical_sha256":"e1d85bfbcf8d897d1558a2ec188a1ea915ee9c15ca832b59f0de7de21bb5dcea","source":{"kind":"arxiv","id":"1407.0645","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.0645","created_at":"2026-05-18T01:24:08Z"},{"alias_kind":"arxiv_version","alias_value":"1407.0645v2","created_at":"2026-05-18T01:24:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.0645","created_at":"2026-05-18T01:24:08Z"},{"alias_kind":"pith_short_12","alias_value":"4HMFX66PRWEX","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"4HMFX66PRWEX2FKY","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"4HMFX66P","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:4HMFX66PRWEX2FKYULWBRCQ6VE","target":"record","payload":{"canonical_record":{"source":{"id":"1407.0645","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2014-07-02T16:53:04Z","cross_cats_sorted":["cs.FL"],"title_canon_sha256":"5616a238cadbcd0e7fb9f1bbfec86c21ff7ef1188cd4fff87294ab455eca8a8f","abstract_canon_sha256":"e77be5a4cad9bc857d51140f5ca0fce5c81a5f3dceb64d19ff59020e0f9e5125"},"schema_version":"1.0"},"canonical_sha256":"e1d85bfbcf8d897d1558a2ec188a1ea915ee9c15ca832b59f0de7de21bb5dcea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:08.858736Z","signature_b64":"hrWVSgpX9Nf42wxGx3vBwl5pXO8BQbtriUhdWBSsLjLsE6DW5GRd4P871BAz31PS4CKjOCHaahMImMAz7QwJCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e1d85bfbcf8d897d1558a2ec188a1ea915ee9c15ca832b59f0de7de21bb5dcea","last_reissued_at":"2026-05-18T01:24:08.858111Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:08.858111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.0645","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":"2026-05-18T01:24:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EqV54+ZRYhG80xybPBM3lF/V5/KSAqVdbzSL0/4nHcVPtJflB6w1zcz0SopVjJXvcQrCgmL0IRkWgo9Q8AoODw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:02:33.425010Z"},"content_sha256":"de36851f10bf62e73cfff89807519f2c58baf443bdb688b99eb0700d6e14b3cf","schema_version":"1.0","event_id":"sha256:de36851f10bf62e73cfff89807519f2c58baf443bdb688b99eb0700d6e14b3cf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:4HMFX66PRWEX2FKYULWBRCQ6VE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Branching Bisimilarity of Normed BPA Processes is in NEXPTIME","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.FL"],"primary_cat":"cs.LO","authors_text":"Petr Jan\\v{c}ar, Wojciech Czerwi\\'nski","submitted_at":"2014-07-02T16:53:04Z","abstract_excerpt":"Branching bisimilarity on normed BPA processes was recently shown to be decidable by Yuxi Fu (ICALP 2013) but his proof has not provided any upper complexity bound. We present a simpler approach based on relative prime decompositions that leads to a nondeterministic exponential-time algorithm; this is close to the known exponential-time lower bound."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.0645","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":"2026-05-18T01:24:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UA2JlOxVJzqJwnljMlE5wZCmxdodXyYNkNJ5DrTBqKD1EuBGUMSPCaNXs23ZMLiisR0w7HhUcu+6dDneYhcfBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:02:33.425390Z"},"content_sha256":"4793b92f261f4eead1f0447ceddef7e0618f0f7236b74152a2c33e72e825ae0d","schema_version":"1.0","event_id":"sha256:4793b92f261f4eead1f0447ceddef7e0618f0f7236b74152a2c33e72e825ae0d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4HMFX66PRWEX2FKYULWBRCQ6VE/bundle.json","state_url":"https://pith.science/pith/4HMFX66PRWEX2FKYULWBRCQ6VE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4HMFX66PRWEX2FKYULWBRCQ6VE/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":"2026-05-28T00:02:33Z","links":{"resolver":"https://pith.science/pith/4HMFX66PRWEX2FKYULWBRCQ6VE","bundle":"https://pith.science/pith/4HMFX66PRWEX2FKYULWBRCQ6VE/bundle.json","state":"https://pith.science/pith/4HMFX66PRWEX2FKYULWBRCQ6VE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4HMFX66PRWEX2FKYULWBRCQ6VE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:4HMFX66PRWEX2FKYULWBRCQ6VE","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":"e77be5a4cad9bc857d51140f5ca0fce5c81a5f3dceb64d19ff59020e0f9e5125","cross_cats_sorted":["cs.FL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2014-07-02T16:53:04Z","title_canon_sha256":"5616a238cadbcd0e7fb9f1bbfec86c21ff7ef1188cd4fff87294ab455eca8a8f"},"schema_version":"1.0","source":{"id":"1407.0645","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.0645","created_at":"2026-05-18T01:24:08Z"},{"alias_kind":"arxiv_version","alias_value":"1407.0645v2","created_at":"2026-05-18T01:24:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.0645","created_at":"2026-05-18T01:24:08Z"},{"alias_kind":"pith_short_12","alias_value":"4HMFX66PRWEX","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"4HMFX66PRWEX2FKY","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"4HMFX66P","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:4793b92f261f4eead1f0447ceddef7e0618f0f7236b74152a2c33e72e825ae0d","target":"graph","created_at":"2026-05-18T01:24:08Z","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":"Branching bisimilarity on normed BPA processes was recently shown to be decidable by Yuxi Fu (ICALP 2013) but his proof has not provided any upper complexity bound. We present a simpler approach based on relative prime decompositions that leads to a nondeterministic exponential-time algorithm; this is close to the known exponential-time lower bound.","authors_text":"Petr Jan\\v{c}ar, Wojciech Czerwi\\'nski","cross_cats":["cs.FL"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2014-07-02T16:53:04Z","title":"Branching Bisimilarity of Normed BPA Processes is in NEXPTIME"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.0645","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:de36851f10bf62e73cfff89807519f2c58baf443bdb688b99eb0700d6e14b3cf","target":"record","created_at":"2026-05-18T01:24:08Z","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":"e77be5a4cad9bc857d51140f5ca0fce5c81a5f3dceb64d19ff59020e0f9e5125","cross_cats_sorted":["cs.FL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2014-07-02T16:53:04Z","title_canon_sha256":"5616a238cadbcd0e7fb9f1bbfec86c21ff7ef1188cd4fff87294ab455eca8a8f"},"schema_version":"1.0","source":{"id":"1407.0645","kind":"arxiv","version":2}},"canonical_sha256":"e1d85bfbcf8d897d1558a2ec188a1ea915ee9c15ca832b59f0de7de21bb5dcea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e1d85bfbcf8d897d1558a2ec188a1ea915ee9c15ca832b59f0de7de21bb5dcea","first_computed_at":"2026-05-18T01:24:08.858111Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:08.858111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hrWVSgpX9Nf42wxGx3vBwl5pXO8BQbtriUhdWBSsLjLsE6DW5GRd4P871BAz31PS4CKjOCHaahMImMAz7QwJCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:08.858736Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.0645","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:de36851f10bf62e73cfff89807519f2c58baf443bdb688b99eb0700d6e14b3cf","sha256:4793b92f261f4eead1f0447ceddef7e0618f0f7236b74152a2c33e72e825ae0d"],"state_sha256":"1d7254135bc40ca8af5efca675d9a58e794ee94bf0c7d11831915bf3bea1e34c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IeUKdPQaXC6yKrzGsCY8FPxwJ6DIUnc5g/GveOY5rf18AO/t+ukLGTzfwhVlTgU5fLtVM0jPRatRFxKDhnsIBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T00:02:33.428104Z","bundle_sha256":"b2afd1aef477991577f09f386956f1399158d10c3c94ef87e016f9c4a90f0f30"}}