{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1995:5QJBRVJY7YPEFFO2YVWAA5VUC4","short_pith_number":"pith:5QJBRVJY","canonical_record":{"source":{"id":"hep-th/9507020","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1995-07-04T21:57:24Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9e62588393fe154f1e83078820795222c78940d0ea17a2dddfdfb1837ab0accb","abstract_canon_sha256":"229b8ca8703b19d9fce259cfb410cba30a22349a8a42f3d43bcfc541ce8d3415"},"schema_version":"1.0"},"canonical_sha256":"ec1218d538fe1e4295dac56c0076b417315127021d2971de5149f2b5cde8d527","source":{"kind":"arxiv","id":"hep-th/9507020","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9507020","created_at":"2026-05-18T01:38:39Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9507020v1","created_at":"2026-05-18T01:38:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9507020","created_at":"2026-05-18T01:38:39Z"},{"alias_kind":"pith_short_12","alias_value":"5QJBRVJY7YPE","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"5QJBRVJY7YPEFFO2","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"5QJBRVJY","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1995:5QJBRVJY7YPEFFO2YVWAA5VUC4","target":"record","payload":{"canonical_record":{"source":{"id":"hep-th/9507020","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1995-07-04T21:57:24Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9e62588393fe154f1e83078820795222c78940d0ea17a2dddfdfb1837ab0accb","abstract_canon_sha256":"229b8ca8703b19d9fce259cfb410cba30a22349a8a42f3d43bcfc541ce8d3415"},"schema_version":"1.0"},"canonical_sha256":"ec1218d538fe1e4295dac56c0076b417315127021d2971de5149f2b5cde8d527","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:38:39.065026Z","signature_b64":"7iIHAfk5rYGaswdWjodnLZ8tecJTYiETjkmUfiCCgmTb+goUCSyUS+VKPpqEka7wxa5znUNFLI8Z0M0MLN4vAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec1218d538fe1e4295dac56c0076b417315127021d2971de5149f2b5cde8d527","last_reissued_at":"2026-05-18T01:38:39.064350Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:38:39.064350Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-th/9507020","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":"2026-05-18T01:38:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d5wgawfCOe0567OMfiOA0R9GbSNOIkM6QDODHTfgxDjquBPolrQDxKezXMPoa8aOVh7y6FMzZQgLDzb/xsyGDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T10:31:25.838935Z"},"content_sha256":"43e8b0e46ad2badf06373c75c63735a7a4a6db3a8f926e52fe645b3ac66ee760","schema_version":"1.0","event_id":"sha256:43e8b0e46ad2badf06373c75c63735a7a4a6db3a8f926e52fe645b3ac66ee760"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1995:5QJBRVJY7YPEFFO2YVWAA5VUC4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Brief Introduction to Poisson Sigma-Models","license":"","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"Peter Schaller, Thomas Strobl","submitted_at":"1995-07-04T21:57:24Z","abstract_excerpt":"The theory of Poisson-$\\sigma$-models employs the mathematical notion of Poisson manifolds to formulate and analyze a large class of topological and almost topological two dimensional field theories. As special examples this class of field theories includes pure Yang-Mills and gravity theories, and, to some extent, the G/G gauged WZW-model. The aim of this contribution is to give a pedagogical introduction, explaining many aspects of the general theory by illustrative examples."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9507020","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":"2026-05-18T01:38:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jRz/2dijUNFR0GV17WSIdKMJu1rx07XKK8Pusy2p2Miur809Lo/tOQnLTgoM8hIvECmiBrlhBULWWHip+r/sAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T10:31:25.839531Z"},"content_sha256":"f5576b9aba1bf914f8c75e491d63accc883c180be933e97bfffee5388e1e2a19","schema_version":"1.0","event_id":"sha256:f5576b9aba1bf914f8c75e491d63accc883c180be933e97bfffee5388e1e2a19"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5QJBRVJY7YPEFFO2YVWAA5VUC4/bundle.json","state_url":"https://pith.science/pith/5QJBRVJY7YPEFFO2YVWAA5VUC4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5QJBRVJY7YPEFFO2YVWAA5VUC4/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":"2026-07-02T10:31:25Z","links":{"resolver":"https://pith.science/pith/5QJBRVJY7YPEFFO2YVWAA5VUC4","bundle":"https://pith.science/pith/5QJBRVJY7YPEFFO2YVWAA5VUC4/bundle.json","state":"https://pith.science/pith/5QJBRVJY7YPEFFO2YVWAA5VUC4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5QJBRVJY7YPEFFO2YVWAA5VUC4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:5QJBRVJY7YPEFFO2YVWAA5VUC4","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":"229b8ca8703b19d9fce259cfb410cba30a22349a8a42f3d43bcfc541ce8d3415","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1995-07-04T21:57:24Z","title_canon_sha256":"9e62588393fe154f1e83078820795222c78940d0ea17a2dddfdfb1837ab0accb"},"schema_version":"1.0","source":{"id":"hep-th/9507020","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9507020","created_at":"2026-05-18T01:38:39Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9507020v1","created_at":"2026-05-18T01:38:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9507020","created_at":"2026-05-18T01:38:39Z"},{"alias_kind":"pith_short_12","alias_value":"5QJBRVJY7YPE","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"5QJBRVJY7YPEFFO2","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"5QJBRVJY","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:f5576b9aba1bf914f8c75e491d63accc883c180be933e97bfffee5388e1e2a19","target":"graph","created_at":"2026-05-18T01:38:39Z","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":"The theory of Poisson-$\\sigma$-models employs the mathematical notion of Poisson manifolds to formulate and analyze a large class of topological and almost topological two dimensional field theories. As special examples this class of field theories includes pure Yang-Mills and gravity theories, and, to some extent, the G/G gauged WZW-model. The aim of this contribution is to give a pedagogical introduction, explaining many aspects of the general theory by illustrative examples.","authors_text":"Peter Schaller, Thomas Strobl","cross_cats":["gr-qc"],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1995-07-04T21:57:24Z","title":"A Brief Introduction to Poisson Sigma-Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9507020","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":"sha256:43e8b0e46ad2badf06373c75c63735a7a4a6db3a8f926e52fe645b3ac66ee760","target":"record","created_at":"2026-05-18T01:38:39Z","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":"229b8ca8703b19d9fce259cfb410cba30a22349a8a42f3d43bcfc541ce8d3415","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1995-07-04T21:57:24Z","title_canon_sha256":"9e62588393fe154f1e83078820795222c78940d0ea17a2dddfdfb1837ab0accb"},"schema_version":"1.0","source":{"id":"hep-th/9507020","kind":"arxiv","version":1}},"canonical_sha256":"ec1218d538fe1e4295dac56c0076b417315127021d2971de5149f2b5cde8d527","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec1218d538fe1e4295dac56c0076b417315127021d2971de5149f2b5cde8d527","first_computed_at":"2026-05-18T01:38:39.064350Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:38:39.064350Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7iIHAfk5rYGaswdWjodnLZ8tecJTYiETjkmUfiCCgmTb+goUCSyUS+VKPpqEka7wxa5znUNFLI8Z0M0MLN4vAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:38:39.065026Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9507020","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:43e8b0e46ad2badf06373c75c63735a7a4a6db3a8f926e52fe645b3ac66ee760","sha256:f5576b9aba1bf914f8c75e491d63accc883c180be933e97bfffee5388e1e2a19"],"state_sha256":"5439112e561ddd2341fea7b0f8ade5d3eb3fe51f8280e3d68bdfa9685b309ba4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"13KDikBw1c7iYrxhtJX8g3Lk/BfO9r8C2xDfDBBN5+0T0Ni95r3pp/in6cqsxNzZmfa/bYOYdb974hTrp1VvDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T10:31:25.841365Z","bundle_sha256":"8f7f97d6297719ab61ae617dec708dcd9dd1261fcd74fbb32682609b85c91235"}}