{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:NKR56WPBMNIUC5XP23U5APJHEH","short_pith_number":"pith:NKR56WPB","canonical_record":{"source":{"id":"1606.02950","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-09T13:16:10Z","cross_cats_sorted":[],"title_canon_sha256":"6f7807d7589f9b9d7ee6b081ed2d4842b0c9932973c63d6b21ea3bca21bb23ba","abstract_canon_sha256":"5db837dce12b288c11eeafab6833d01f6e86fb2ba5ff34dc9535a9a3fc2ee1a0"},"schema_version":"1.0"},"canonical_sha256":"6aa3df59e163514176efd6e9d03d2721e1c46a5fa13692801b65f9f34ac6fd62","source":{"kind":"arxiv","id":"1606.02950","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.02950","created_at":"2026-05-18T01:10:37Z"},{"alias_kind":"arxiv_version","alias_value":"1606.02950v2","created_at":"2026-05-18T01:10:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.02950","created_at":"2026-05-18T01:10:37Z"},{"alias_kind":"pith_short_12","alias_value":"NKR56WPBMNIU","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"NKR56WPBMNIUC5XP","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"NKR56WPB","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:NKR56WPBMNIUC5XP23U5APJHEH","target":"record","payload":{"canonical_record":{"source":{"id":"1606.02950","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-09T13:16:10Z","cross_cats_sorted":[],"title_canon_sha256":"6f7807d7589f9b9d7ee6b081ed2d4842b0c9932973c63d6b21ea3bca21bb23ba","abstract_canon_sha256":"5db837dce12b288c11eeafab6833d01f6e86fb2ba5ff34dc9535a9a3fc2ee1a0"},"schema_version":"1.0"},"canonical_sha256":"6aa3df59e163514176efd6e9d03d2721e1c46a5fa13692801b65f9f34ac6fd62","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:37.420885Z","signature_b64":"1sri8idgvvdeixs03JlPp0EKXh29XkWdxY1Z7tm3sCafawO3a5dio7AxGWA+DFAkWZFmEqdkv3c/dG0P7M5dBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6aa3df59e163514176efd6e9d03d2721e1c46a5fa13692801b65f9f34ac6fd62","last_reissued_at":"2026-05-18T01:10:37.420219Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:37.420219Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.02950","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":"2026-05-18T01:10:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xE/12GJ6APKtR8EZfE4JH/oNfVnqyj2DQBFu/0WsSjEHFQLsm1fX+u99rVDcUPJn6b53NR9rcnf0sHMo4sCHDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T11:02:28.909956Z"},"content_sha256":"bb488d2de972d6d07f126db81547076da5f2f762449d663eabd7a8fe3d8a0f28","schema_version":"1.0","event_id":"sha256:bb488d2de972d6d07f126db81547076da5f2f762449d663eabd7a8fe3d8a0f28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:NKR56WPBMNIUC5XP23U5APJHEH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Lectures on the Bethe Ansatz","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Fedor Levkovich-Maslyuk","submitted_at":"2016-06-09T13:16:10Z","abstract_excerpt":"We give a pedagogical introduction to the Bethe ansatz techniques in integrable QFTs and spin chains. We first discuss and motivate the general framework of asymptotic Bethe ansatz for the spectrum of integrable QFTs in large volume, based on the exact S-matrix. Then we illustrate this method in several concrete theories. The first case we study is the SU(2) chiral Gross-Neveu model. We derive the Bethe equations via algebraic Bethe ansatz, solving in the process the Heisenberg XXX spin chain. We discuss this famous spin chain model in some detail, covering in particular the coordinate Bethe a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.02950","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":"2026-05-18T01:10:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1kdSBIMD37oG7a+DAkxT9yIQEjBJROsEhVTEwMjn2xgiLM03EIReNdnp5ZFXdt9owjqdVLt5JYB1yjI/0M/9BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T11:02:28.910831Z"},"content_sha256":"2f546fba62b3b4573475ece46b5cfdb35c6c92c0052b6ec63acc08123635fb0c","schema_version":"1.0","event_id":"sha256:2f546fba62b3b4573475ece46b5cfdb35c6c92c0052b6ec63acc08123635fb0c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NKR56WPBMNIUC5XP23U5APJHEH/bundle.json","state_url":"https://pith.science/pith/NKR56WPBMNIUC5XP23U5APJHEH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NKR56WPBMNIUC5XP23U5APJHEH/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":"2026-08-20T11:02:28Z","links":{"resolver":"https://pith.science/pith/NKR56WPBMNIUC5XP23U5APJHEH","bundle":"https://pith.science/pith/NKR56WPBMNIUC5XP23U5APJHEH/bundle.json","state":"https://pith.science/pith/NKR56WPBMNIUC5XP23U5APJHEH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NKR56WPBMNIUC5XP23U5APJHEH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:NKR56WPBMNIUC5XP23U5APJHEH","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":"5db837dce12b288c11eeafab6833d01f6e86fb2ba5ff34dc9535a9a3fc2ee1a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-09T13:16:10Z","title_canon_sha256":"6f7807d7589f9b9d7ee6b081ed2d4842b0c9932973c63d6b21ea3bca21bb23ba"},"schema_version":"1.0","source":{"id":"1606.02950","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.02950","created_at":"2026-05-18T01:10:37Z"},{"alias_kind":"arxiv_version","alias_value":"1606.02950v2","created_at":"2026-05-18T01:10:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.02950","created_at":"2026-05-18T01:10:37Z"},{"alias_kind":"pith_short_12","alias_value":"NKR56WPBMNIU","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"NKR56WPBMNIUC5XP","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"NKR56WPB","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:2f546fba62b3b4573475ece46b5cfdb35c6c92c0052b6ec63acc08123635fb0c","target":"graph","created_at":"2026-05-18T01:10:37Z","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":"We give a pedagogical introduction to the Bethe ansatz techniques in integrable QFTs and spin chains. We first discuss and motivate the general framework of asymptotic Bethe ansatz for the spectrum of integrable QFTs in large volume, based on the exact S-matrix. Then we illustrate this method in several concrete theories. The first case we study is the SU(2) chiral Gross-Neveu model. We derive the Bethe equations via algebraic Bethe ansatz, solving in the process the Heisenberg XXX spin chain. We discuss this famous spin chain model in some detail, covering in particular the coordinate Bethe a","authors_text":"Fedor Levkovich-Maslyuk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-09T13:16:10Z","title":"Lectures on the Bethe Ansatz"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.02950","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:bb488d2de972d6d07f126db81547076da5f2f762449d663eabd7a8fe3d8a0f28","target":"record","created_at":"2026-05-18T01:10:37Z","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":"5db837dce12b288c11eeafab6833d01f6e86fb2ba5ff34dc9535a9a3fc2ee1a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-09T13:16:10Z","title_canon_sha256":"6f7807d7589f9b9d7ee6b081ed2d4842b0c9932973c63d6b21ea3bca21bb23ba"},"schema_version":"1.0","source":{"id":"1606.02950","kind":"arxiv","version":2}},"canonical_sha256":"6aa3df59e163514176efd6e9d03d2721e1c46a5fa13692801b65f9f34ac6fd62","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6aa3df59e163514176efd6e9d03d2721e1c46a5fa13692801b65f9f34ac6fd62","first_computed_at":"2026-05-18T01:10:37.420219Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:37.420219Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1sri8idgvvdeixs03JlPp0EKXh29XkWdxY1Z7tm3sCafawO3a5dio7AxGWA+DFAkWZFmEqdkv3c/dG0P7M5dBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:37.420885Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.02950","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb488d2de972d6d07f126db81547076da5f2f762449d663eabd7a8fe3d8a0f28","sha256:2f546fba62b3b4573475ece46b5cfdb35c6c92c0052b6ec63acc08123635fb0c"],"state_sha256":"06c396084f5640a978eb0416bd6adcf5b823135bc8340b1c135244060d2a8290"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fcph2p1ti0tXXyr36hGzp6i6lkQDGrxCvRLICBolX6FqCK2NzMc43hAqDWUw3ML2j6tizS/3MhqxtlKS5kQYDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T11:02:28.916309Z","bundle_sha256":"18cc345ff79ca48d92af81283ea7b3cd8f6e235f3ec08116d4d29515432473c8"}}