{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:X7X73KVCWIJUOGYAFVXTLVDK2V","short_pith_number":"pith:X7X73KVC","canonical_record":{"source":{"id":"2202.02725","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.OC","submitted_at":"2022-02-06T07:49:19Z","cross_cats_sorted":[],"title_canon_sha256":"de39af7e2e0dbab4087da12d36c27e31f77f31840b5878a22030f654ed6f0b27","abstract_canon_sha256":"4cd7fcbdc04a095f0692958d88af0f5e1ac39693987af5e864494c79c5c14fe8"},"schema_version":"1.0"},"canonical_sha256":"bfeffdaaa2b213471b002d6f35d46ad5591819bfe6ee3b1dd3a3b7d9042e6ba8","source":{"kind":"arxiv","id":"2202.02725","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.02725","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"arxiv_version","alias_value":"2202.02725v1","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.02725","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"pith_short_12","alias_value":"X7X73KVCWIJU","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"pith_short_16","alias_value":"X7X73KVCWIJUOGYA","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"pith_short_8","alias_value":"X7X73KVC","created_at":"2026-07-05T03:54:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:X7X73KVCWIJUOGYAFVXTLVDK2V","target":"record","payload":{"canonical_record":{"source":{"id":"2202.02725","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.OC","submitted_at":"2022-02-06T07:49:19Z","cross_cats_sorted":[],"title_canon_sha256":"de39af7e2e0dbab4087da12d36c27e31f77f31840b5878a22030f654ed6f0b27","abstract_canon_sha256":"4cd7fcbdc04a095f0692958d88af0f5e1ac39693987af5e864494c79c5c14fe8"},"schema_version":"1.0"},"canonical_sha256":"bfeffdaaa2b213471b002d6f35d46ad5591819bfe6ee3b1dd3a3b7d9042e6ba8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:54:32.387093Z","signature_b64":"B8VjFiq+9kfCmN6s9+MUzS6mcqbLxDMrUU5OmeE/uG6GhK+1TLT7b1Wqr6GGPYEXAUr0XBi5VcxL13Xt8ig3Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bfeffdaaa2b213471b002d6f35d46ad5591819bfe6ee3b1dd3a3b7d9042e6ba8","last_reissued_at":"2026-07-05T03:54:32.386569Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:54:32.386569Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2202.02725","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":"2026-07-05T03:54:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o7jWAauhPagkE1c6NIarSx6eDgqSCQdjeCHVCrG3Vafx3xVREHZM94kI82MXkTQHBcnlZVkwR70C7espv+hmBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:48:42.147414Z"},"content_sha256":"644721714c7d0d25fbf2a7ff43c8d9d167bd607f9d9fd9c08e01ad20cc97894e","schema_version":"1.0","event_id":"sha256:644721714c7d0d25fbf2a7ff43c8d9d167bd607f9d9fd9c08e01ad20cc97894e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:X7X73KVCWIJUOGYAFVXTLVDK2V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient primal heuristics for mixed-integer linear programs","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"math.OC","authors_text":"Akang Wang, Dong Zhang, Haohan Huang, Linxin Yang, Sha Lai, Shengcheng Shao, Tao Quan, Xiang Zhou, Xiaodong Luo, Yuanming Zhu","submitted_at":"2022-02-06T07:49:19Z","abstract_excerpt":"This paper is a short report about our work for the primal task in the Machine Learning for Combinatorial Optimization NeurIPS 2021 Competition. For each dataset of our interest in the competition, we propose customized primal heuristic methods to efficiently identify high-quality feasible solutions. The computational studies demonstrate the superiority of our proposed approaches over the competitors'."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.02725","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2202.02725/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:54:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X4TuTWJhgluV5Fpzd3qvuY22dOzRq0cvDnUTwbIikGy7+6ESNQ/gfVe4YdLe7BP/xUIqGxi09oBrUvcT7XOFCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:48:42.147793Z"},"content_sha256":"3f03b3b2828a1f3172d0f5984bfbeb6bfe970f17147d38251b50e5fc1f3efcce","schema_version":"1.0","event_id":"sha256:3f03b3b2828a1f3172d0f5984bfbeb6bfe970f17147d38251b50e5fc1f3efcce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X7X73KVCWIJUOGYAFVXTLVDK2V/bundle.json","state_url":"https://pith.science/pith/X7X73KVCWIJUOGYAFVXTLVDK2V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X7X73KVCWIJUOGYAFVXTLVDK2V/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":"2026-08-03T18:48:42Z","links":{"resolver":"https://pith.science/pith/X7X73KVCWIJUOGYAFVXTLVDK2V","bundle":"https://pith.science/pith/X7X73KVCWIJUOGYAFVXTLVDK2V/bundle.json","state":"https://pith.science/pith/X7X73KVCWIJUOGYAFVXTLVDK2V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X7X73KVCWIJUOGYAFVXTLVDK2V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:X7X73KVCWIJUOGYAFVXTLVDK2V","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":"4cd7fcbdc04a095f0692958d88af0f5e1ac39693987af5e864494c79c5c14fe8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.OC","submitted_at":"2022-02-06T07:49:19Z","title_canon_sha256":"de39af7e2e0dbab4087da12d36c27e31f77f31840b5878a22030f654ed6f0b27"},"schema_version":"1.0","source":{"id":"2202.02725","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.02725","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"arxiv_version","alias_value":"2202.02725v1","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.02725","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"pith_short_12","alias_value":"X7X73KVCWIJU","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"pith_short_16","alias_value":"X7X73KVCWIJUOGYA","created_at":"2026-07-05T03:54:32Z"},{"alias_kind":"pith_short_8","alias_value":"X7X73KVC","created_at":"2026-07-05T03:54:32Z"}],"graph_snapshots":[{"event_id":"sha256:3f03b3b2828a1f3172d0f5984bfbeb6bfe970f17147d38251b50e5fc1f3efcce","target":"graph","created_at":"2026-07-05T03:54:32Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2202.02725/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper is a short report about our work for the primal task in the Machine Learning for Combinatorial Optimization NeurIPS 2021 Competition. For each dataset of our interest in the competition, we propose customized primal heuristic methods to efficiently identify high-quality feasible solutions. The computational studies demonstrate the superiority of our proposed approaches over the competitors'.","authors_text":"Akang Wang, Dong Zhang, Haohan Huang, Linxin Yang, Sha Lai, Shengcheng Shao, Tao Quan, Xiang Zhou, Xiaodong Luo, Yuanming Zhu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.OC","submitted_at":"2022-02-06T07:49:19Z","title":"Efficient primal heuristics for mixed-integer linear programs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.02725","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":"sha256:644721714c7d0d25fbf2a7ff43c8d9d167bd607f9d9fd9c08e01ad20cc97894e","target":"record","created_at":"2026-07-05T03:54:32Z","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":"4cd7fcbdc04a095f0692958d88af0f5e1ac39693987af5e864494c79c5c14fe8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.OC","submitted_at":"2022-02-06T07:49:19Z","title_canon_sha256":"de39af7e2e0dbab4087da12d36c27e31f77f31840b5878a22030f654ed6f0b27"},"schema_version":"1.0","source":{"id":"2202.02725","kind":"arxiv","version":1}},"canonical_sha256":"bfeffdaaa2b213471b002d6f35d46ad5591819bfe6ee3b1dd3a3b7d9042e6ba8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfeffdaaa2b213471b002d6f35d46ad5591819bfe6ee3b1dd3a3b7d9042e6ba8","first_computed_at":"2026-07-05T03:54:32.386569Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:54:32.386569Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B8VjFiq+9kfCmN6s9+MUzS6mcqbLxDMrUU5OmeE/uG6GhK+1TLT7b1Wqr6GGPYEXAUr0XBi5VcxL13Xt8ig3Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:54:32.387093Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.02725","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:644721714c7d0d25fbf2a7ff43c8d9d167bd607f9d9fd9c08e01ad20cc97894e","sha256:3f03b3b2828a1f3172d0f5984bfbeb6bfe970f17147d38251b50e5fc1f3efcce"],"state_sha256":"ab79d2db79699ddd86e6eb133b7e3270f84865e93a8ebda035dc95016dd8ed82"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"84nFcF2xHh6/+Ned++Ye39+he4pLebEQchJsj/dvk7jibbcdP/R4LiWV9mCgnF2M1E18ultSMxPFOr+JaFd5CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T18:48:42.150963Z","bundle_sha256":"6c453580380bc711f2beddc2d40b4902550f82a0f49e6ab9929ad5f59e71d130"}}