{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:OAVE2DKLYNNBLOQRS4STBBQSZQ","short_pith_number":"pith:OAVE2DKL","canonical_record":{"source":{"id":"1209.0949","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-05T12:35:41Z","cross_cats_sorted":[],"title_canon_sha256":"87e405f09e99afc5c8f579bd1bfe7618cabf014c2a491e69231f2eba81798826","abstract_canon_sha256":"2e0785bb1a16acb8aaf2ded24b07e4bb76cd12e86b7381f72e120510cc51efd6"},"schema_version":"1.0"},"canonical_sha256":"702a4d0d4bc35a15ba119725308612cc20482c2165b3e3ce620d70cfb82cbeb4","source":{"kind":"arxiv","id":"1209.0949","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0949","created_at":"2026-05-18T03:25:59Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0949v1","created_at":"2026-05-18T03:25:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0949","created_at":"2026-05-18T03:25:59Z"},{"alias_kind":"pith_short_12","alias_value":"OAVE2DKLYNNB","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OAVE2DKLYNNBLOQR","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OAVE2DKL","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:OAVE2DKLYNNBLOQRS4STBBQSZQ","target":"record","payload":{"canonical_record":{"source":{"id":"1209.0949","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-05T12:35:41Z","cross_cats_sorted":[],"title_canon_sha256":"87e405f09e99afc5c8f579bd1bfe7618cabf014c2a491e69231f2eba81798826","abstract_canon_sha256":"2e0785bb1a16acb8aaf2ded24b07e4bb76cd12e86b7381f72e120510cc51efd6"},"schema_version":"1.0"},"canonical_sha256":"702a4d0d4bc35a15ba119725308612cc20482c2165b3e3ce620d70cfb82cbeb4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:25:59.296327Z","signature_b64":"fiatnhSbqNwpPZkCqq5S+DUdIVTkpmsfQWflUCc9Q9hkDH1VKraVyPi2QeeaVO9PzDJbhGOnS6qbfUJ/KFJkDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"702a4d0d4bc35a15ba119725308612cc20482c2165b3e3ce620d70cfb82cbeb4","last_reissued_at":"2026-05-18T03:25:59.295571Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:25:59.295571Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.0949","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":"2026-05-18T03:25:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W2wyLanEH44yDRkNfykylxDZj3CSfqVPP1to08GHIU6G4+h0dzHls4WQLmIyNkXNMVOJwt32Ran86kWA6r+LDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:36:19.495772Z"},"content_sha256":"37fc380b1bc35eab1c126b1518935284e24cc766c109d3e56f53e4eae1dc5e7e","schema_version":"1.0","event_id":"sha256:37fc380b1bc35eab1c126b1518935284e24cc766c109d3e56f53e4eae1dc5e7e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:OAVE2DKLYNNBLOQRS4STBBQSZQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A simple algorithm for automatic Feynman diagram generation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Bo Xiao, Hao Wang, Shou-hua Zhu","submitted_at":"2012-09-05T12:35:41Z","abstract_excerpt":"An algorithm for the automatic Feynman diagram (FD) generation is presented in this paper. The algorithm starts directly from the definition formula of FD, and is simple in concept and easy for coding. The symmetry factor for each FD is naturally generated. It is expected to bring convenience for the researchers who are studying new calculation techniques or making new calculation tools and for the researchers who are studying effective field theory. A C-program made from the algorithm is also presented, which is short, fast, yet very general purpose: it receives arbitrary user defined model a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0949","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":"2026-05-18T03:25:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Gz5sR6GeADMPtSn9HoOfk0xv2gAB3YWIprE81yt2CtZPzRYvZDGmzRyXBZTC+V4fiszEepLMADZvGxXOr0RCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:36:19.496111Z"},"content_sha256":"818d3e5c35f63ba19d52e05367591f908e09a6f2f1cddbf404111fc806183a3d","schema_version":"1.0","event_id":"sha256:818d3e5c35f63ba19d52e05367591f908e09a6f2f1cddbf404111fc806183a3d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OAVE2DKLYNNBLOQRS4STBBQSZQ/bundle.json","state_url":"https://pith.science/pith/OAVE2DKLYNNBLOQRS4STBBQSZQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OAVE2DKLYNNBLOQRS4STBBQSZQ/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":"2026-06-01T20:36:19Z","links":{"resolver":"https://pith.science/pith/OAVE2DKLYNNBLOQRS4STBBQSZQ","bundle":"https://pith.science/pith/OAVE2DKLYNNBLOQRS4STBBQSZQ/bundle.json","state":"https://pith.science/pith/OAVE2DKLYNNBLOQRS4STBBQSZQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OAVE2DKLYNNBLOQRS4STBBQSZQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:OAVE2DKLYNNBLOQRS4STBBQSZQ","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":"2e0785bb1a16acb8aaf2ded24b07e4bb76cd12e86b7381f72e120510cc51efd6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-05T12:35:41Z","title_canon_sha256":"87e405f09e99afc5c8f579bd1bfe7618cabf014c2a491e69231f2eba81798826"},"schema_version":"1.0","source":{"id":"1209.0949","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0949","created_at":"2026-05-18T03:25:59Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0949v1","created_at":"2026-05-18T03:25:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0949","created_at":"2026-05-18T03:25:59Z"},{"alias_kind":"pith_short_12","alias_value":"OAVE2DKLYNNB","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OAVE2DKLYNNBLOQR","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OAVE2DKL","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:818d3e5c35f63ba19d52e05367591f908e09a6f2f1cddbf404111fc806183a3d","target":"graph","created_at":"2026-05-18T03:25:59Z","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":"An algorithm for the automatic Feynman diagram (FD) generation is presented in this paper. The algorithm starts directly from the definition formula of FD, and is simple in concept and easy for coding. The symmetry factor for each FD is naturally generated. It is expected to bring convenience for the researchers who are studying new calculation techniques or making new calculation tools and for the researchers who are studying effective field theory. A C-program made from the algorithm is also presented, which is short, fast, yet very general purpose: it receives arbitrary user defined model a","authors_text":"Bo Xiao, Hao Wang, Shou-hua Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-05T12:35:41Z","title":"A simple algorithm for automatic Feynman diagram generation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0949","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":"sha256:37fc380b1bc35eab1c126b1518935284e24cc766c109d3e56f53e4eae1dc5e7e","target":"record","created_at":"2026-05-18T03:25:59Z","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":"2e0785bb1a16acb8aaf2ded24b07e4bb76cd12e86b7381f72e120510cc51efd6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-05T12:35:41Z","title_canon_sha256":"87e405f09e99afc5c8f579bd1bfe7618cabf014c2a491e69231f2eba81798826"},"schema_version":"1.0","source":{"id":"1209.0949","kind":"arxiv","version":1}},"canonical_sha256":"702a4d0d4bc35a15ba119725308612cc20482c2165b3e3ce620d70cfb82cbeb4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"702a4d0d4bc35a15ba119725308612cc20482c2165b3e3ce620d70cfb82cbeb4","first_computed_at":"2026-05-18T03:25:59.295571Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:25:59.295571Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fiatnhSbqNwpPZkCqq5S+DUdIVTkpmsfQWflUCc9Q9hkDH1VKraVyPi2QeeaVO9PzDJbhGOnS6qbfUJ/KFJkDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:25:59.296327Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.0949","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37fc380b1bc35eab1c126b1518935284e24cc766c109d3e56f53e4eae1dc5e7e","sha256:818d3e5c35f63ba19d52e05367591f908e09a6f2f1cddbf404111fc806183a3d"],"state_sha256":"65879908c404d0b52d34d006b7896dbc2ac57a1e1fcd829371c485fac095ff43"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y4owPEllainNKvmsWzP2QF6sMMp1OovVB3E3f+bpdbHG6tXGMc+wC7QsnojqRUig9vAzs/aWhoiNU6d0GBCfDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T20:36:19.497956Z","bundle_sha256":"82fdcadc9a61a11542c9525e894068da3719bc4abf44960dc8be0b6d8bde3a71"}}