{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:UGCI6OP2264PSTJ6THNR5WHAOQ","short_pith_number":"pith:UGCI6OP2","canonical_record":{"source":{"id":"1808.06255","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2018-08-19T20:49:31Z","cross_cats_sorted":["cs.SE","math.LO"],"title_canon_sha256":"15503366dcdf1d2803cf7543b01e67c136db4737795a8cc7af2fffbe07c470ed","abstract_canon_sha256":"3044c008c03b9578af56471312d8363e6092cb44a7acb173fb6cbf4057190531"},"schema_version":"1.0"},"canonical_sha256":"a1848f39fad7b8f94d3e99db1ed8e074182a576e29e91eb72f6b716b5d986118","source":{"kind":"arxiv","id":"1808.06255","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06255","created_at":"2026-05-18T00:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06255v1","created_at":"2026-05-18T00:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06255","created_at":"2026-05-18T00:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"UGCI6OP2264P","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UGCI6OP2264PSTJ6","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UGCI6OP2","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:UGCI6OP2264PSTJ6THNR5WHAOQ","target":"record","payload":{"canonical_record":{"source":{"id":"1808.06255","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2018-08-19T20:49:31Z","cross_cats_sorted":["cs.SE","math.LO"],"title_canon_sha256":"15503366dcdf1d2803cf7543b01e67c136db4737795a8cc7af2fffbe07c470ed","abstract_canon_sha256":"3044c008c03b9578af56471312d8363e6092cb44a7acb173fb6cbf4057190531"},"schema_version":"1.0"},"canonical_sha256":"a1848f39fad7b8f94d3e99db1ed8e074182a576e29e91eb72f6b716b5d986118","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:45.559214Z","signature_b64":"WLdU5BhYTb3BvS2bvEr6D6MJSD0xjCCFbtQnYgem8hL3pALH/JJN2IYO7c8MR/JfYGPEB00hiV1PloQhH+OnDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1848f39fad7b8f94d3e99db1ed8e074182a576e29e91eb72f6b716b5d986118","last_reissued_at":"2026-05-18T00:07:45.558581Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:45.558581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.06255","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WRBCWDOcWvrCiEuL/RA4WcbcAX3Tyc6h52Y52ajt9aj8Xn9fwhBgOSbDRSo+KHFl1pDRwd7NLrho/L3oFjwYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T10:15:39.078765Z"},"content_sha256":"d68863bc3165d11c252268adfb09fc21d391d2d821e42f7d7f573bfd54edd9ab","schema_version":"1.0","event_id":"sha256:d68863bc3165d11c252268adfb09fc21d391d2d821e42f7d7f573bfd54edd9ab"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:UGCI6OP2264PSTJ6THNR5WHAOQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolving Algebras 1993: Lipari Guide","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SE","math.LO"],"primary_cat":"cs.LO","authors_text":"Yuri Gurevich","submitted_at":"2018-08-19T20:49:31Z","abstract_excerpt":"Computation models and specification methods seem to be worlds apart. The project on abstract state machines (in short ASMs, also known as evolving algebras) started as an attempt to bridge the gap by improving on Turing's thesis. We sought more versatile machines which would be able to step-for-step simulate arbitrary algorithms on their natural abstraction levels. The ASM thesis asserts that ASMs are such versatile machines. The guide provides the definitions of sequential, parallel and distributed ASMs."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06255","kind":"arxiv","version":1},"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":"2026-05-18T00:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hYtMCceeRb69kVdYaSZNoo/sQgGkA8YNaQWflOqy1DomsBuoPbich82xzRjbrolq8T32DjvO/uKNaDTvSshfAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T10:15:39.080172Z"},"content_sha256":"0c30236b9f92de294a678913ce66e7f2b9502f6ebeba9aaf65662b1af32e3d59","schema_version":"1.0","event_id":"sha256:0c30236b9f92de294a678913ce66e7f2b9502f6ebeba9aaf65662b1af32e3d59"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UGCI6OP2264PSTJ6THNR5WHAOQ/bundle.json","state_url":"https://pith.science/pith/UGCI6OP2264PSTJ6THNR5WHAOQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UGCI6OP2264PSTJ6THNR5WHAOQ/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":"2026-08-17T10:15:39Z","links":{"resolver":"https://pith.science/pith/UGCI6OP2264PSTJ6THNR5WHAOQ","bundle":"https://pith.science/pith/UGCI6OP2264PSTJ6THNR5WHAOQ/bundle.json","state":"https://pith.science/pith/UGCI6OP2264PSTJ6THNR5WHAOQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UGCI6OP2264PSTJ6THNR5WHAOQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UGCI6OP2264PSTJ6THNR5WHAOQ","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":"3044c008c03b9578af56471312d8363e6092cb44a7acb173fb6cbf4057190531","cross_cats_sorted":["cs.SE","math.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2018-08-19T20:49:31Z","title_canon_sha256":"15503366dcdf1d2803cf7543b01e67c136db4737795a8cc7af2fffbe07c470ed"},"schema_version":"1.0","source":{"id":"1808.06255","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06255","created_at":"2026-05-18T00:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06255v1","created_at":"2026-05-18T00:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06255","created_at":"2026-05-18T00:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"UGCI6OP2264P","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UGCI6OP2264PSTJ6","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UGCI6OP2","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:0c30236b9f92de294a678913ce66e7f2b9502f6ebeba9aaf65662b1af32e3d59","target":"graph","created_at":"2026-05-18T00:07:45Z","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":"Computation models and specification methods seem to be worlds apart. The project on abstract state machines (in short ASMs, also known as evolving algebras) started as an attempt to bridge the gap by improving on Turing's thesis. We sought more versatile machines which would be able to step-for-step simulate arbitrary algorithms on their natural abstraction levels. The ASM thesis asserts that ASMs are such versatile machines. The guide provides the definitions of sequential, parallel and distributed ASMs.","authors_text":"Yuri Gurevich","cross_cats":["cs.SE","math.LO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2018-08-19T20:49:31Z","title":"Evolving Algebras 1993: Lipari Guide"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06255","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:d68863bc3165d11c252268adfb09fc21d391d2d821e42f7d7f573bfd54edd9ab","target":"record","created_at":"2026-05-18T00:07:45Z","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":"3044c008c03b9578af56471312d8363e6092cb44a7acb173fb6cbf4057190531","cross_cats_sorted":["cs.SE","math.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2018-08-19T20:49:31Z","title_canon_sha256":"15503366dcdf1d2803cf7543b01e67c136db4737795a8cc7af2fffbe07c470ed"},"schema_version":"1.0","source":{"id":"1808.06255","kind":"arxiv","version":1}},"canonical_sha256":"a1848f39fad7b8f94d3e99db1ed8e074182a576e29e91eb72f6b716b5d986118","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1848f39fad7b8f94d3e99db1ed8e074182a576e29e91eb72f6b716b5d986118","first_computed_at":"2026-05-18T00:07:45.558581Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:45.558581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WLdU5BhYTb3BvS2bvEr6D6MJSD0xjCCFbtQnYgem8hL3pALH/JJN2IYO7c8MR/JfYGPEB00hiV1PloQhH+OnDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:45.559214Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.06255","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d68863bc3165d11c252268adfb09fc21d391d2d821e42f7d7f573bfd54edd9ab","sha256:0c30236b9f92de294a678913ce66e7f2b9502f6ebeba9aaf65662b1af32e3d59"],"state_sha256":"2e65a5067c831c110abeda37fe6c104153e3cf0f04f99f535c2048e184b0a693"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AhPEAUyxsT1cvXpQr6/FFevOSHR3jG+wiP+1EAmMdEaUVyTN8hv9cl8OwbqNl/H4SXA2trZiz7zRaokj/GokBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T10:15:39.085213Z","bundle_sha256":"0509695a6bfdb78d8adacb77148b58078b791d12b089b55c203ed8b2ea721461"}}