{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:2ERJOTNQ7ZUHXN6RT3VENLILUR","short_pith_number":"pith:2ERJOTNQ","canonical_record":{"source":{"id":"1102.4076","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-fin.ST","submitted_at":"2011-02-20T15:05:00Z","cross_cats_sorted":[],"title_canon_sha256":"7631abcdcdee36dacec991c18a1e1f9ea946fdcf9777dfc9b0357dd6ccb96835","abstract_canon_sha256":"8dba41ca56a812e32d654ed5877dae47ea4888c0cff0e224cbdd78e79e940287"},"schema_version":"1.0"},"canonical_sha256":"d122974db0fe687bb7d19eea46ad0ba447a5c1b08b78d4d593bcd443a914c5b3","source":{"kind":"arxiv","id":"1102.4076","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.4076","created_at":"2026-05-18T02:03:07Z"},{"alias_kind":"arxiv_version","alias_value":"1102.4076v1","created_at":"2026-05-18T02:03:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.4076","created_at":"2026-05-18T02:03:07Z"},{"alias_kind":"pith_short_12","alias_value":"2ERJOTNQ7ZUH","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2ERJOTNQ7ZUHXN6R","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2ERJOTNQ","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:2ERJOTNQ7ZUHXN6RT3VENLILUR","target":"record","payload":{"canonical_record":{"source":{"id":"1102.4076","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-fin.ST","submitted_at":"2011-02-20T15:05:00Z","cross_cats_sorted":[],"title_canon_sha256":"7631abcdcdee36dacec991c18a1e1f9ea946fdcf9777dfc9b0357dd6ccb96835","abstract_canon_sha256":"8dba41ca56a812e32d654ed5877dae47ea4888c0cff0e224cbdd78e79e940287"},"schema_version":"1.0"},"canonical_sha256":"d122974db0fe687bb7d19eea46ad0ba447a5c1b08b78d4d593bcd443a914c5b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:07.388836Z","signature_b64":"wodDo7oa8iOGUFro9JIR5LjdksGphcgKAvMnrPvWTmG5q4Cn0zUl7S9jab8HENIwCwN5vJi/WQW3G4sxvS7PCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d122974db0fe687bb7d19eea46ad0ba447a5c1b08b78d4d593bcd443a914c5b3","last_reissued_at":"2026-05-18T02:03:07.388273Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:07.388273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.4076","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":"2026-05-18T02:03:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YFdnYXsm6Tm+RJYVjr4DSzYUXKjF+mjrA0nQMGXDIS4Ht+8DENgs7WJ03Rn8jGswDCO91TF5RdSQuSBUNZHnCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T17:02:33.909997Z"},"content_sha256":"fee3a2676035097924c7ca39f02681a0af999ba1fca4c02c08baf1345f1f961f","schema_version":"1.0","event_id":"sha256:fee3a2676035097924c7ca39f02681a0af999ba1fca4c02c08baf1345f1f961f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:2ERJOTNQ7ZUHXN6RT3VENLILUR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The fine structure of spectral properties for random correlation matrices: an application to financial markets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"q-fin.ST","authors_text":"E. Scalas, G. Livan, S. Alfarano","submitted_at":"2011-02-20T15:05:00Z","abstract_excerpt":"We study some properties of eigenvalue spectra of financial correlation matrices. In particular, we investigate the nature of the large eigenvalue bulks which are observed empirically, and which have often been regarded as a consequence of the supposedly large amount of noise contained in financial data. We challenge this common knowledge by acting on the empirical correlation matrices of two data sets with a filtering procedure which highlights some of the cluster structure they contain, and we analyze the consequences of such filtering on eigenvalue spectra. We show that empirically observed"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4076","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":"2026-05-18T02:03:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MZb3bwNu5BxtX+YCt4aWQQuLK6KKHByFVZ1trACLfTzU6cLP280oxWwMmLu4yPthjPfGVw4CXpatLLgfuqLgCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T17:02:33.910356Z"},"content_sha256":"30d2d1bff6a88f5fddc192dc40fa8e52a05b7ffad29741c42538143e85f7a1b5","schema_version":"1.0","event_id":"sha256:30d2d1bff6a88f5fddc192dc40fa8e52a05b7ffad29741c42538143e85f7a1b5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2ERJOTNQ7ZUHXN6RT3VENLILUR/bundle.json","state_url":"https://pith.science/pith/2ERJOTNQ7ZUHXN6RT3VENLILUR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2ERJOTNQ7ZUHXN6RT3VENLILUR/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":"2026-06-25T17:02:33Z","links":{"resolver":"https://pith.science/pith/2ERJOTNQ7ZUHXN6RT3VENLILUR","bundle":"https://pith.science/pith/2ERJOTNQ7ZUHXN6RT3VENLILUR/bundle.json","state":"https://pith.science/pith/2ERJOTNQ7ZUHXN6RT3VENLILUR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2ERJOTNQ7ZUHXN6RT3VENLILUR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:2ERJOTNQ7ZUHXN6RT3VENLILUR","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":"8dba41ca56a812e32d654ed5877dae47ea4888c0cff0e224cbdd78e79e940287","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-fin.ST","submitted_at":"2011-02-20T15:05:00Z","title_canon_sha256":"7631abcdcdee36dacec991c18a1e1f9ea946fdcf9777dfc9b0357dd6ccb96835"},"schema_version":"1.0","source":{"id":"1102.4076","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.4076","created_at":"2026-05-18T02:03:07Z"},{"alias_kind":"arxiv_version","alias_value":"1102.4076v1","created_at":"2026-05-18T02:03:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.4076","created_at":"2026-05-18T02:03:07Z"},{"alias_kind":"pith_short_12","alias_value":"2ERJOTNQ7ZUH","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2ERJOTNQ7ZUHXN6R","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2ERJOTNQ","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:30d2d1bff6a88f5fddc192dc40fa8e52a05b7ffad29741c42538143e85f7a1b5","target":"graph","created_at":"2026-05-18T02:03:07Z","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 study some properties of eigenvalue spectra of financial correlation matrices. In particular, we investigate the nature of the large eigenvalue bulks which are observed empirically, and which have often been regarded as a consequence of the supposedly large amount of noise contained in financial data. We challenge this common knowledge by acting on the empirical correlation matrices of two data sets with a filtering procedure which highlights some of the cluster structure they contain, and we analyze the consequences of such filtering on eigenvalue spectra. We show that empirically observed","authors_text":"E. Scalas, G. Livan, S. Alfarano","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-fin.ST","submitted_at":"2011-02-20T15:05:00Z","title":"The fine structure of spectral properties for random correlation matrices: an application to financial markets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4076","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:fee3a2676035097924c7ca39f02681a0af999ba1fca4c02c08baf1345f1f961f","target":"record","created_at":"2026-05-18T02:03:07Z","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":"8dba41ca56a812e32d654ed5877dae47ea4888c0cff0e224cbdd78e79e940287","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-fin.ST","submitted_at":"2011-02-20T15:05:00Z","title_canon_sha256":"7631abcdcdee36dacec991c18a1e1f9ea946fdcf9777dfc9b0357dd6ccb96835"},"schema_version":"1.0","source":{"id":"1102.4076","kind":"arxiv","version":1}},"canonical_sha256":"d122974db0fe687bb7d19eea46ad0ba447a5c1b08b78d4d593bcd443a914c5b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d122974db0fe687bb7d19eea46ad0ba447a5c1b08b78d4d593bcd443a914c5b3","first_computed_at":"2026-05-18T02:03:07.388273Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:07.388273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wodDo7oa8iOGUFro9JIR5LjdksGphcgKAvMnrPvWTmG5q4Cn0zUl7S9jab8HENIwCwN5vJi/WQW3G4sxvS7PCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:07.388836Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.4076","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fee3a2676035097924c7ca39f02681a0af999ba1fca4c02c08baf1345f1f961f","sha256:30d2d1bff6a88f5fddc192dc40fa8e52a05b7ffad29741c42538143e85f7a1b5"],"state_sha256":"7eb12f40eb594bdcc0fdbd9e0b695cce618a5fe19aa53988090eb289a534d22b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NV0k+E3QVX5/BdgFVAm/R2Jsr0TByQfOi/vszTsffMczE2e9ds3iwdisbXi3/cuIAvbWWasjvTBhhXrifBitCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T17:02:33.912262Z","bundle_sha256":"0e945a00af3eb234f06ed7ee1d485ffee3181759b7c371f1799098f85f778b4d"}}