{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:KMS4TX6252POXHXFMV7U5W4AK2","short_pith_number":"pith:KMS4TX62","canonical_record":{"source":{"id":"1704.06209","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2017-04-20T16:15:40Z","cross_cats_sorted":["cs.LG","eess.SP"],"title_canon_sha256":"8a56c637667a0104773cb00abee9be837736b77f47cd7455255d7d823062916d","abstract_canon_sha256":"4562c4af23c7dde59929db5807c042a3f1fb959272502b492897c9c61087e48c"},"schema_version":"1.0"},"canonical_sha256":"5325c9dfdaee9eeb9ee5657f4edb8056971e6a62256a537d423d8333f4352e2a","source":{"kind":"arxiv","id":"1704.06209","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.06209","created_at":"2026-05-18T00:31:02Z"},{"alias_kind":"arxiv_version","alias_value":"1704.06209v1","created_at":"2026-05-18T00:31:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.06209","created_at":"2026-05-18T00:31:02Z"},{"alias_kind":"pith_short_12","alias_value":"KMS4TX6252PO","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"KMS4TX6252POXHXF","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"KMS4TX62","created_at":"2026-05-18T12:31:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:KMS4TX6252POXHXFMV7U5W4AK2","target":"record","payload":{"canonical_record":{"source":{"id":"1704.06209","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2017-04-20T16:15:40Z","cross_cats_sorted":["cs.LG","eess.SP"],"title_canon_sha256":"8a56c637667a0104773cb00abee9be837736b77f47cd7455255d7d823062916d","abstract_canon_sha256":"4562c4af23c7dde59929db5807c042a3f1fb959272502b492897c9c61087e48c"},"schema_version":"1.0"},"canonical_sha256":"5325c9dfdaee9eeb9ee5657f4edb8056971e6a62256a537d423d8333f4352e2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:02.873272Z","signature_b64":"D3vZL2Lm5aMLcByAXuC0JHK4zcBBBfouT7dyYCDajZIYOJZ6o3O57G1ZH+868p4VKxp6ezEre9q7GiDG4BI4Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5325c9dfdaee9eeb9ee5657f4edb8056971e6a62256a537d423d8333f4352e2a","last_reissued_at":"2026-05-18T00:31:02.872625Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:02.872625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.06209","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":"2026-05-18T00:31:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"39GdqtABRlqJCqUgQbJKvDEXZ6f8K1AC7U8YBf0F36au9zoGry6fBb23wslHCPFmgPT3VGmGYfRbjrF98XmxBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:01:41.736583Z"},"content_sha256":"ec10931e353b7ef056f4472182a9578ddf22791c8469cad72f068dcd9b5448cd","schema_version":"1.0","event_id":"sha256:ec10931e353b7ef056f4472182a9578ddf22791c8469cad72f068dcd9b5448cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:KMS4TX6252POXHXFMV7U5W4AK2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ADMM Penalty Parameter Selection by Residual Balancing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG","eess.SP"],"primary_cat":"math.OC","authors_text":"Brendt Wohlberg","submitted_at":"2017-04-20T16:15:40Z","abstract_excerpt":"Appropriate selection of the penalty parameter is crucial to obtaining good performance from the Alternating Direction Method of Multipliers (ADMM). While analytic results for optimal selection of this parameter are very limited, there is a heuristic method that appears to be relatively successful in a number of different problems. The contribution of this paper is to demonstrate that their is a potentially serious flaw in this heuristic approach, and to propose a modification that at least partially addresses it."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.06209","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":"2026-05-18T00:31:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Oy7/SYvklR38+vw7qKEYORlMJQAo4RPlkCvTiSDEXW9rFbWfZxBtY+UyW913pD5ovdwR1DTQjOaw0zeeFsNIDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:01:41.737310Z"},"content_sha256":"49cb87a2ef16aff53c5eb6cc3d087ff99d6fa004f0d6b3946c1b61186ff2de3e","schema_version":"1.0","event_id":"sha256:49cb87a2ef16aff53c5eb6cc3d087ff99d6fa004f0d6b3946c1b61186ff2de3e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KMS4TX6252POXHXFMV7U5W4AK2/bundle.json","state_url":"https://pith.science/pith/KMS4TX6252POXHXFMV7U5W4AK2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KMS4TX6252POXHXFMV7U5W4AK2/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":"2026-05-27T23:01:41Z","links":{"resolver":"https://pith.science/pith/KMS4TX6252POXHXFMV7U5W4AK2","bundle":"https://pith.science/pith/KMS4TX6252POXHXFMV7U5W4AK2/bundle.json","state":"https://pith.science/pith/KMS4TX6252POXHXFMV7U5W4AK2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KMS4TX6252POXHXFMV7U5W4AK2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:KMS4TX6252POXHXFMV7U5W4AK2","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":"4562c4af23c7dde59929db5807c042a3f1fb959272502b492897c9c61087e48c","cross_cats_sorted":["cs.LG","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2017-04-20T16:15:40Z","title_canon_sha256":"8a56c637667a0104773cb00abee9be837736b77f47cd7455255d7d823062916d"},"schema_version":"1.0","source":{"id":"1704.06209","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.06209","created_at":"2026-05-18T00:31:02Z"},{"alias_kind":"arxiv_version","alias_value":"1704.06209v1","created_at":"2026-05-18T00:31:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.06209","created_at":"2026-05-18T00:31:02Z"},{"alias_kind":"pith_short_12","alias_value":"KMS4TX6252PO","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"KMS4TX6252POXHXF","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"KMS4TX62","created_at":"2026-05-18T12:31:24Z"}],"graph_snapshots":[{"event_id":"sha256:49cb87a2ef16aff53c5eb6cc3d087ff99d6fa004f0d6b3946c1b61186ff2de3e","target":"graph","created_at":"2026-05-18T00:31:02Z","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":"Appropriate selection of the penalty parameter is crucial to obtaining good performance from the Alternating Direction Method of Multipliers (ADMM). While analytic results for optimal selection of this parameter are very limited, there is a heuristic method that appears to be relatively successful in a number of different problems. The contribution of this paper is to demonstrate that their is a potentially serious flaw in this heuristic approach, and to propose a modification that at least partially addresses it.","authors_text":"Brendt Wohlberg","cross_cats":["cs.LG","eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2017-04-20T16:15:40Z","title":"ADMM Penalty Parameter Selection by Residual Balancing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.06209","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:ec10931e353b7ef056f4472182a9578ddf22791c8469cad72f068dcd9b5448cd","target":"record","created_at":"2026-05-18T00:31:02Z","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":"4562c4af23c7dde59929db5807c042a3f1fb959272502b492897c9c61087e48c","cross_cats_sorted":["cs.LG","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2017-04-20T16:15:40Z","title_canon_sha256":"8a56c637667a0104773cb00abee9be837736b77f47cd7455255d7d823062916d"},"schema_version":"1.0","source":{"id":"1704.06209","kind":"arxiv","version":1}},"canonical_sha256":"5325c9dfdaee9eeb9ee5657f4edb8056971e6a62256a537d423d8333f4352e2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5325c9dfdaee9eeb9ee5657f4edb8056971e6a62256a537d423d8333f4352e2a","first_computed_at":"2026-05-18T00:31:02.872625Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:02.872625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D3vZL2Lm5aMLcByAXuC0JHK4zcBBBfouT7dyYCDajZIYOJZ6o3O57G1ZH+868p4VKxp6ezEre9q7GiDG4BI4Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:02.873272Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.06209","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ec10931e353b7ef056f4472182a9578ddf22791c8469cad72f068dcd9b5448cd","sha256:49cb87a2ef16aff53c5eb6cc3d087ff99d6fa004f0d6b3946c1b61186ff2de3e"],"state_sha256":"03ec8495fa247e25efaaf6365b3d09693e8ad0789e57e0fb09fd5a10743c6e3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mgts0r6ePbc7Nrjz3+9vVziyZhTO1axwCKRKTBZkXfuEz6I8jNyt0tFHqlsXWO025thk1Aa7kNXHPrINici9Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T23:01:41.741301Z","bundle_sha256":"4392ffcb325b5653ad9319df43d30070056ff1f3cd47df08cfc6412a01afd81b"}}