{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WESFGLNEA5O34DWJS4SXCESLW5","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":"c9616b908a99886034345e8cb31f6e59bb49aa0932aba4173ea31be29fc7f167","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2018-08-17T09:13:44Z","title_canon_sha256":"9927ca9e507db5716db4638fd6a7170d80bdf7a8deec0d6efadbd4d8692e66d5"},"schema_version":"1.0","source":{"id":"1808.05802","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.05802","created_at":"2026-05-17T23:44:00Z"},{"alias_kind":"arxiv_version","alias_value":"1808.05802v2","created_at":"2026-05-17T23:44:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.05802","created_at":"2026-05-17T23:44:00Z"},{"alias_kind":"pith_short_12","alias_value":"WESFGLNEA5O3","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"WESFGLNEA5O34DWJ","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"WESFGLNE","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:e9bed37f6de45832df0afbdd37d6773f1a50789b1693a0ff3b8b710116cc0c7e","target":"graph","created_at":"2026-05-17T23:44:00Z","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":"Ptychography has risen as a reference X-ray imaging technique: it achieves resolutions of one billionth of a meter, macroscopic field of view, or the capability to retrieve chemical or magnetic contrast, among other features. A ptychographyic reconstruction is normally formulated as a blind phase retrieval problem, where both the image (sample) and the probe (illumination) have to be recovered from phaseless measured data. In this article we address a nonlinear least squares model for the blind ptychography problem with constraints on the image and the probe by maximum likelihood estimation of","authors_text":"Huibin Chang, Pable Enfedaque, Stefano Marchesini","cross_cats":["eess.IV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2018-08-17T09:13:44Z","title":"Blind Ptychographic Phase Retrieval via Convergent Alternating Direction Method of Multipliers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.05802","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":"sha256:7343bfde50748f878d1545335a8fc7bbdbf03d7368c04eae49a4e4c7365d2d0b","target":"record","created_at":"2026-05-17T23:44:00Z","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":"c9616b908a99886034345e8cb31f6e59bb49aa0932aba4173ea31be29fc7f167","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2018-08-17T09:13:44Z","title_canon_sha256":"9927ca9e507db5716db4638fd6a7170d80bdf7a8deec0d6efadbd4d8692e66d5"},"schema_version":"1.0","source":{"id":"1808.05802","kind":"arxiv","version":2}},"canonical_sha256":"b124532da4075dbe0ec9972571124bb77998f4fc4dca13af7ae03f253e32f398","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b124532da4075dbe0ec9972571124bb77998f4fc4dca13af7ae03f253e32f398","first_computed_at":"2026-05-17T23:44:00.173608Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:00.173608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z8zWlAbX5/1RrmVfDpuU2rpJawzBxRsTCO6H3ABJX8J4GkW7d1HY+jjkxanqCEZP0qAYP2rygO7rtt2gqvyfDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:00.174166Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.05802","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7343bfde50748f878d1545335a8fc7bbdbf03d7368c04eae49a4e4c7365d2d0b","sha256:e9bed37f6de45832df0afbdd37d6773f1a50789b1693a0ff3b8b710116cc0c7e"],"state_sha256":"8230bb03fc1770d532508b06a3b119467b1a733e1a25859b72ec933084356b8a"}