{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:MXHW4CTGQKPDYBSKPSQBD4UPYY","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":"7750639327b2d39475c57f7cf7615eecd8832c863469e75731a858889765e17b","cross_cats_sorted":["math.AG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NT","submitted_at":"2016-02-09T18:56:33Z","title_canon_sha256":"1204b29814f3c053cf920a92c57bb7b002418fd70fcd178e3c45561685f22569"},"schema_version":"1.0","source":{"id":"1602.03118","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.03118","created_at":"2026-05-18T00:39:23Z"},{"alias_kind":"arxiv_version","alias_value":"1602.03118v4","created_at":"2026-05-18T00:39:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.03118","created_at":"2026-05-18T00:39:23Z"},{"alias_kind":"pith_short_12","alias_value":"MXHW4CTGQKPD","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MXHW4CTGQKPDYBSK","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MXHW4CTG","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:a62be2c45a65d49adf072d4d98a119d0e13be526dc610e5a4b152862ae29347e","target":"graph","created_at":"2026-05-18T00:39:23Z","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 report on our investigations concerning algebraic and transcendental Brauer-Manin obstructions to integral points on complements of a hyperplane section in degree four del Pezzo surfaces. We discuss moreover two concepts of an obstruction at an archimedean place. Concrete examples are given of pairs of non-homogeneous quadratic polynomials in four variables representing (0,0) over Q and over Z_p for all primes p, but not over Z. By blow-up, these yield cubic polynomials in three variables all integral solutions of which satisfy a gcd condition.","authors_text":"Damaris Schindler, J\\\"org Jahnel","cross_cats":["math.AG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NT","submitted_at":"2016-02-09T18:56:33Z","title":"On integral points on degree four del Pezzo surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.03118","kind":"arxiv","version":4},"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":"sha256:493ef10d9d835bfa272fba8aac7df6fc5d8e659e6458df6fef9be0a363f5d0a6","target":"record","created_at":"2026-05-18T00:39:23Z","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":"7750639327b2d39475c57f7cf7615eecd8832c863469e75731a858889765e17b","cross_cats_sorted":["math.AG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NT","submitted_at":"2016-02-09T18:56:33Z","title_canon_sha256":"1204b29814f3c053cf920a92c57bb7b002418fd70fcd178e3c45561685f22569"},"schema_version":"1.0","source":{"id":"1602.03118","kind":"arxiv","version":4}},"canonical_sha256":"65cf6e0a66829e3c064a7ca011f28fc61f856c4968da2ad26e0f2893db8b55f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65cf6e0a66829e3c064a7ca011f28fc61f856c4968da2ad26e0f2893db8b55f5","first_computed_at":"2026-05-18T00:39:23.222916Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:23.222916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5g6z0Q6n14AQLitAOTgb5kcFCDMf4C1X4eF/flMzGXizfid27TbPr02pPalmkcS3tLLnMoJkY04UncZHAG8dAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:23.223719Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.03118","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:493ef10d9d835bfa272fba8aac7df6fc5d8e659e6458df6fef9be0a363f5d0a6","sha256:a62be2c45a65d49adf072d4d98a119d0e13be526dc610e5a4b152862ae29347e"],"state_sha256":"99f960ca065a0a6d4258c07f5bacb8d7dd7508ee084215abbd9bb6c0d3c3ba10"}