{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:NCIKBPILONYRNKTZUYMIHGR3IS","short_pith_number":"pith:NCIKBPIL","canonical_record":{"source":{"id":"1702.00280","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-01-31T01:53:52Z","cross_cats_sorted":[],"title_canon_sha256":"1539260c359d447be0be75097392d2bfaa48767eedeefa1f4aae27a9ba965911","abstract_canon_sha256":"05737959d530f6811acbbecb87c8ddff58672e311481ff5965a8eca0428ca2ee"},"schema_version":"1.0"},"canonical_sha256":"6890a0bd0b737116aa79a618839a3b449d6826172b21c85f5b3bbef0153425ae","source":{"kind":"arxiv","id":"1702.00280","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.00280","created_at":"2026-05-18T00:51:34Z"},{"alias_kind":"arxiv_version","alias_value":"1702.00280v1","created_at":"2026-05-18T00:51:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.00280","created_at":"2026-05-18T00:51:34Z"},{"alias_kind":"pith_short_12","alias_value":"NCIKBPILONYR","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"NCIKBPILONYRNKTZ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"NCIKBPIL","created_at":"2026-05-18T12:31:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:NCIKBPILONYRNKTZUYMIHGR3IS","target":"record","payload":{"canonical_record":{"source":{"id":"1702.00280","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-01-31T01:53:52Z","cross_cats_sorted":[],"title_canon_sha256":"1539260c359d447be0be75097392d2bfaa48767eedeefa1f4aae27a9ba965911","abstract_canon_sha256":"05737959d530f6811acbbecb87c8ddff58672e311481ff5965a8eca0428ca2ee"},"schema_version":"1.0"},"canonical_sha256":"6890a0bd0b737116aa79a618839a3b449d6826172b21c85f5b3bbef0153425ae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:34.748079Z","signature_b64":"gPAaw+TR9ztrukTWc+rf5cEaBQUAhkhRa1mXYgPaAmuLjAmeinXB5ajVoxg/EO1iljOxOhROn0tsqrN5mTwlCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6890a0bd0b737116aa79a618839a3b449d6826172b21c85f5b3bbef0153425ae","last_reissued_at":"2026-05-18T00:51:34.747714Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:34.747714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.00280","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":"2026-05-18T00:51:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T+4Stis6iKP0rMvOtmJYCHlWjcGMwkuzOqzAIN0YZiucopJ3ZdIKQJtIpB58VU+yXS5dugqPO5vFghJeXEniAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T19:59:15.079568Z"},"content_sha256":"b21f75817cd72561b59b9567238e711606040ff23be2553c170835d01685acc9","schema_version":"1.0","event_id":"sha256:b21f75817cd72561b59b9567238e711606040ff23be2553c170835d01685acc9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:NCIKBPILONYRNKTZUYMIHGR3IS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two classes of quadratic vector fields for which the Kahan discretization is integrable","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.NA","authors_text":"Brynjulf Owren, David I. McLaren, Elena Celledoni, G.R.W. Quispel, Robert I. McLachlan","submitted_at":"2017-01-31T01:53:52Z","abstract_excerpt":"Applying Kahan's discretization to the reduced Nahm equations, we obtain two classes of integrable mappings."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.00280","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":"2026-05-18T00:51:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5kyLQhV2AkVKMVa+dYc7gyQvq/Rfj+LIBfqYjEmTEkNMcsxy+NA3DXRKRLCsWsoV9u4rP29QZIzFJJ59BIFVBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T19:59:15.079911Z"},"content_sha256":"4a3fa1828a52de13bf899db72c290f0211d42e1742caad0ad9c13a0a049ae79f","schema_version":"1.0","event_id":"sha256:4a3fa1828a52de13bf899db72c290f0211d42e1742caad0ad9c13a0a049ae79f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NCIKBPILONYRNKTZUYMIHGR3IS/bundle.json","state_url":"https://pith.science/pith/NCIKBPILONYRNKTZUYMIHGR3IS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NCIKBPILONYRNKTZUYMIHGR3IS/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":"2026-06-03T19:59:15Z","links":{"resolver":"https://pith.science/pith/NCIKBPILONYRNKTZUYMIHGR3IS","bundle":"https://pith.science/pith/NCIKBPILONYRNKTZUYMIHGR3IS/bundle.json","state":"https://pith.science/pith/NCIKBPILONYRNKTZUYMIHGR3IS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NCIKBPILONYRNKTZUYMIHGR3IS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NCIKBPILONYRNKTZUYMIHGR3IS","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":"05737959d530f6811acbbecb87c8ddff58672e311481ff5965a8eca0428ca2ee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-01-31T01:53:52Z","title_canon_sha256":"1539260c359d447be0be75097392d2bfaa48767eedeefa1f4aae27a9ba965911"},"schema_version":"1.0","source":{"id":"1702.00280","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.00280","created_at":"2026-05-18T00:51:34Z"},{"alias_kind":"arxiv_version","alias_value":"1702.00280v1","created_at":"2026-05-18T00:51:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.00280","created_at":"2026-05-18T00:51:34Z"},{"alias_kind":"pith_short_12","alias_value":"NCIKBPILONYR","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"NCIKBPILONYRNKTZ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"NCIKBPIL","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:4a3fa1828a52de13bf899db72c290f0211d42e1742caad0ad9c13a0a049ae79f","target":"graph","created_at":"2026-05-18T00:51:34Z","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":"Applying Kahan's discretization to the reduced Nahm equations, we obtain two classes of integrable mappings.","authors_text":"Brynjulf Owren, David I. McLaren, Elena Celledoni, G.R.W. Quispel, Robert I. McLachlan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-01-31T01:53:52Z","title":"Two classes of quadratic vector fields for which the Kahan discretization is integrable"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.00280","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:b21f75817cd72561b59b9567238e711606040ff23be2553c170835d01685acc9","target":"record","created_at":"2026-05-18T00:51:34Z","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":"05737959d530f6811acbbecb87c8ddff58672e311481ff5965a8eca0428ca2ee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-01-31T01:53:52Z","title_canon_sha256":"1539260c359d447be0be75097392d2bfaa48767eedeefa1f4aae27a9ba965911"},"schema_version":"1.0","source":{"id":"1702.00280","kind":"arxiv","version":1}},"canonical_sha256":"6890a0bd0b737116aa79a618839a3b449d6826172b21c85f5b3bbef0153425ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6890a0bd0b737116aa79a618839a3b449d6826172b21c85f5b3bbef0153425ae","first_computed_at":"2026-05-18T00:51:34.747714Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:51:34.747714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gPAaw+TR9ztrukTWc+rf5cEaBQUAhkhRa1mXYgPaAmuLjAmeinXB5ajVoxg/EO1iljOxOhROn0tsqrN5mTwlCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:51:34.748079Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.00280","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b21f75817cd72561b59b9567238e711606040ff23be2553c170835d01685acc9","sha256:4a3fa1828a52de13bf899db72c290f0211d42e1742caad0ad9c13a0a049ae79f"],"state_sha256":"8c9bc0aa3b8028d3e7c2729c0448216c3b486e9effcb102a2ce091f6631363da"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GxbRrwuP0qIHNOjzP1mwKcHgFlpTVyDU/0nNp5SSaFHQRseLeucFnucoMXUfeCj4d3rKqcFHXzmaBp4ulTFTDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T19:59:15.081842Z","bundle_sha256":"e823a9becde2f71365b498ab28597da39cb0515cb3d4595f3aead8e273a8fd2f"}}