{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:R3WOO4CUBZTPEG5WJRWCDXIFXI","short_pith_number":"pith:R3WOO4CU","canonical_record":{"source":{"id":"1710.06915","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2017-10-16T22:29:25Z","cross_cats_sorted":["cs.SC"],"title_canon_sha256":"b8d8699cc7b63aa1dac1e2cb53848d1c18cbb9b6586b7b3e31462f7809b04578","abstract_canon_sha256":"65e7b917c1d9364998042340a588cdcfcb9ae75ac4047721441f56e1fe6cc7d6"},"schema_version":"1.0"},"canonical_sha256":"8eece770540e66f21bb64c6c21dd05ba361c71f81100f5e3e0d2dd89ed198fe4","source":{"kind":"arxiv","id":"1710.06915","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.06915","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"arxiv_version","alias_value":"1710.06915v1","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.06915","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"pith_short_12","alias_value":"R3WOO4CUBZTP","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"R3WOO4CUBZTPEG5W","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"R3WOO4CU","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:R3WOO4CUBZTPEG5WJRWCDXIFXI","target":"record","payload":{"canonical_record":{"source":{"id":"1710.06915","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2017-10-16T22:29:25Z","cross_cats_sorted":["cs.SC"],"title_canon_sha256":"b8d8699cc7b63aa1dac1e2cb53848d1c18cbb9b6586b7b3e31462f7809b04578","abstract_canon_sha256":"65e7b917c1d9364998042340a588cdcfcb9ae75ac4047721441f56e1fe6cc7d6"},"schema_version":"1.0"},"canonical_sha256":"8eece770540e66f21bb64c6c21dd05ba361c71f81100f5e3e0d2dd89ed198fe4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:27.701992Z","signature_b64":"mQkwIpUgx11TN8h6CN/DCFZ1lecJBiVisxvrJSqoPRNDt/siX1AhWL5AV3YIYARiXOvhUj6QaENThIHEW/bEBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8eece770540e66f21bb64c6c21dd05ba361c71f81100f5e3e0d2dd89ed198fe4","last_reissued_at":"2026-05-18T00:32:27.701415Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:27.701415Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1710.06915","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":"2026-05-18T00:32:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XsvUw85EvTEtIGWA4P2JYbg8lNFVu4zIGxiO7QgGawn7dmYs/PNyI1+B7zge41BAjeAgaQ2Qp1bry6G21xamDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:11:38.860036Z"},"content_sha256":"52931b5ae6032a130ef8f2289051cde9e0e4532d5c9acf8fdae43c0a81d6b6fd","schema_version":"1.0","event_id":"sha256:52931b5ae6032a130ef8f2289051cde9e0e4532d5c9acf8fdae43c0a81d6b6fd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:R3WOO4CUBZTPEG5WJRWCDXIFXI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"MatchPy: A Pattern Matching Library","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SC"],"primary_cat":"cs.PL","authors_text":"Henrik Barthels, Manuel Krebber, Paolo Bientinesi","submitted_at":"2017-10-16T22:29:25Z","abstract_excerpt":"Pattern matching is a powerful tool for symbolic computations, based on the well-defined theory of term rewriting systems. Application domains include algebraic expressions, abstract syntax trees, and XML and JSON data. Unfortunately, no lightweight implementation of pattern matching as general and flexible as Mathematica exists for Python Mathics,MacroPy,patterns,PyPatt. Therefore, we created the open source module MatchPy which offers similar pattern matching functionality in Python using a novel algorithm which finds matches for large pattern sets more efficiently by exploiting similarities"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.06915","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":"2026-05-18T00:32:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I0QQehnhmmPbnF1ocICoKbpEBSBWYybkJn1J9Ibm2MKN+hiwqLcC0dcxJ8OCMq+hS9oDhrMCfcqdagPNRNZJDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:11:38.860403Z"},"content_sha256":"c1a21031e213d81718899ec8e050f628ec5b69add68d705492fb5a61da161170","schema_version":"1.0","event_id":"sha256:c1a21031e213d81718899ec8e050f628ec5b69add68d705492fb5a61da161170"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R3WOO4CUBZTPEG5WJRWCDXIFXI/bundle.json","state_url":"https://pith.science/pith/R3WOO4CUBZTPEG5WJRWCDXIFXI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R3WOO4CUBZTPEG5WJRWCDXIFXI/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":"2026-06-05T12:11:38Z","links":{"resolver":"https://pith.science/pith/R3WOO4CUBZTPEG5WJRWCDXIFXI","bundle":"https://pith.science/pith/R3WOO4CUBZTPEG5WJRWCDXIFXI/bundle.json","state":"https://pith.science/pith/R3WOO4CUBZTPEG5WJRWCDXIFXI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R3WOO4CUBZTPEG5WJRWCDXIFXI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:R3WOO4CUBZTPEG5WJRWCDXIFXI","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":"65e7b917c1d9364998042340a588cdcfcb9ae75ac4047721441f56e1fe6cc7d6","cross_cats_sorted":["cs.SC"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2017-10-16T22:29:25Z","title_canon_sha256":"b8d8699cc7b63aa1dac1e2cb53848d1c18cbb9b6586b7b3e31462f7809b04578"},"schema_version":"1.0","source":{"id":"1710.06915","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.06915","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"arxiv_version","alias_value":"1710.06915v1","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.06915","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"pith_short_12","alias_value":"R3WOO4CUBZTP","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"R3WOO4CUBZTPEG5W","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"R3WOO4CU","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:c1a21031e213d81718899ec8e050f628ec5b69add68d705492fb5a61da161170","target":"graph","created_at":"2026-05-18T00:32:27Z","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":"Pattern matching is a powerful tool for symbolic computations, based on the well-defined theory of term rewriting systems. Application domains include algebraic expressions, abstract syntax trees, and XML and JSON data. Unfortunately, no lightweight implementation of pattern matching as general and flexible as Mathematica exists for Python Mathics,MacroPy,patterns,PyPatt. Therefore, we created the open source module MatchPy which offers similar pattern matching functionality in Python using a novel algorithm which finds matches for large pattern sets more efficiently by exploiting similarities","authors_text":"Henrik Barthels, Manuel Krebber, Paolo Bientinesi","cross_cats":["cs.SC"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2017-10-16T22:29:25Z","title":"MatchPy: A Pattern Matching Library"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.06915","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":"sha256:52931b5ae6032a130ef8f2289051cde9e0e4532d5c9acf8fdae43c0a81d6b6fd","target":"record","created_at":"2026-05-18T00:32:27Z","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":"65e7b917c1d9364998042340a588cdcfcb9ae75ac4047721441f56e1fe6cc7d6","cross_cats_sorted":["cs.SC"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2017-10-16T22:29:25Z","title_canon_sha256":"b8d8699cc7b63aa1dac1e2cb53848d1c18cbb9b6586b7b3e31462f7809b04578"},"schema_version":"1.0","source":{"id":"1710.06915","kind":"arxiv","version":1}},"canonical_sha256":"8eece770540e66f21bb64c6c21dd05ba361c71f81100f5e3e0d2dd89ed198fe4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8eece770540e66f21bb64c6c21dd05ba361c71f81100f5e3e0d2dd89ed198fe4","first_computed_at":"2026-05-18T00:32:27.701415Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:27.701415Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mQkwIpUgx11TN8h6CN/DCFZ1lecJBiVisxvrJSqoPRNDt/siX1AhWL5AV3YIYARiXOvhUj6QaENThIHEW/bEBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:27.701992Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.06915","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52931b5ae6032a130ef8f2289051cde9e0e4532d5c9acf8fdae43c0a81d6b6fd","sha256:c1a21031e213d81718899ec8e050f628ec5b69add68d705492fb5a61da161170"],"state_sha256":"7d8ad294c34ce775a7094d53e91b11c72f9ca3967c165749810dc71cfc773d28"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/rBEqbINfzCYMw0Y/dNSyZ+3y9/PjwsPglbUY+J8bmIDvC81ZUbHxxv2DjBLNEoMpn8b1fjyuSpqMLan+YeDCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:11:38.863116Z","bundle_sha256":"1e928b3675bbbf1b662825e1915507f5224ef770e94ff79add8917e93f066b11"}}