{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:KJWYGGSD4ACPH5ZZIDFENO2LXQ","short_pith_number":"pith:KJWYGGSD","canonical_record":{"source":{"id":"2407.04660","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-07-05T17:17:38Z","cross_cats_sorted":[],"title_canon_sha256":"2987fe0f326938b848e640de9e0607f34c860855ecef6b67a3ec9bea5d0eb5bf","abstract_canon_sha256":"9ed3be30c8f0c7f73995bce66f9f9075aa3fc3a0a8b8bc0e2e2dadb8371b38ea"},"schema_version":"1.0"},"canonical_sha256":"526d831a43e004f3f73940ca46bb4bbc044e1139960ee7543dd18534231d2108","source":{"kind":"arxiv","id":"2407.04660","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.04660","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"arxiv_version","alias_value":"2407.04660v2","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.04660","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"pith_short_12","alias_value":"KJWYGGSD4ACP","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"pith_short_16","alias_value":"KJWYGGSD4ACPH5ZZ","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"pith_short_8","alias_value":"KJWYGGSD","created_at":"2026-07-05T10:48:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:KJWYGGSD4ACPH5ZZIDFENO2LXQ","target":"record","payload":{"canonical_record":{"source":{"id":"2407.04660","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-07-05T17:17:38Z","cross_cats_sorted":[],"title_canon_sha256":"2987fe0f326938b848e640de9e0607f34c860855ecef6b67a3ec9bea5d0eb5bf","abstract_canon_sha256":"9ed3be30c8f0c7f73995bce66f9f9075aa3fc3a0a8b8bc0e2e2dadb8371b38ea"},"schema_version":"1.0"},"canonical_sha256":"526d831a43e004f3f73940ca46bb4bbc044e1139960ee7543dd18534231d2108","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:48:17.314294Z","signature_b64":"BLhig2XF1RwVTvbqZ3AJlfu5mhGKQTAui5d7QMK9d3p72dXddfkogRKIKplswULB748STCLgd+MzyydNjfYtBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"526d831a43e004f3f73940ca46bb4bbc044e1139960ee7543dd18534231d2108","last_reissued_at":"2026-07-05T10:48:17.313822Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:48:17.313822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.04660","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:48:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"868ybUhj2kro5iWwg+iQAsfqNs3sXCY8bGP7OomEpxis05LWNz/GXzZleCqovqhZS/XhYTAwwkNiUo0lo8vCCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T21:37:50.818912Z"},"content_sha256":"758075adc834e3a1ce2be7312b68314524d8c9eacf7cb287044241c9dcc5c123","schema_version":"1.0","event_id":"sha256:758075adc834e3a1ce2be7312b68314524d8c9eacf7cb287044241c9dcc5c123"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:KJWYGGSD4ACPH5ZZIDFENO2LXQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"COBRA: Optimal Factorization of Cosmological Observables","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Nora Elisa Chisari, Thomas Bakx, Zvonimir Vlah","submitted_at":"2024-07-05T17:17:38Z","abstract_excerpt":"We introduce COBRA (Cosmology with Optimally factorized Bases of Radial Approximants), a novel framework for rapid computation of large-scale structure observables. COBRA separates scale dependence from cosmological parameters in the linear matter power spectrum while also minimising the number of necessary basis terms $N_b$, thus enabling direct and efficient computation of derived and nonlinear observables. Moreover, the dependence on cosmological parameters is efficiently approximated using radial basis function interpolation. We apply our framework to decompose the linear matter power spec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.04660","kind":"arxiv","version":2},"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/2407.04660/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":"2026-07-05T10:48:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cc5iUxF2AuaUjfVfF074HF8gKtpAgf4Gr8COHHAv2+T8GZfMdMO66FVT5HVj0TuiaWkaTBY+nZa2ZrDcv30IDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T21:37:50.819521Z"},"content_sha256":"37472f42a39396d5a243b660654bd4e450d243b5a650201816b62e76ca3ffb66","schema_version":"1.0","event_id":"sha256:37472f42a39396d5a243b660654bd4e450d243b5a650201816b62e76ca3ffb66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KJWYGGSD4ACPH5ZZIDFENO2LXQ/bundle.json","state_url":"https://pith.science/pith/KJWYGGSD4ACPH5ZZIDFENO2LXQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KJWYGGSD4ACPH5ZZIDFENO2LXQ/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":"2026-08-07T21:37:50Z","links":{"resolver":"https://pith.science/pith/KJWYGGSD4ACPH5ZZIDFENO2LXQ","bundle":"https://pith.science/pith/KJWYGGSD4ACPH5ZZIDFENO2LXQ/bundle.json","state":"https://pith.science/pith/KJWYGGSD4ACPH5ZZIDFENO2LXQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KJWYGGSD4ACPH5ZZIDFENO2LXQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:KJWYGGSD4ACPH5ZZIDFENO2LXQ","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":"9ed3be30c8f0c7f73995bce66f9f9075aa3fc3a0a8b8bc0e2e2dadb8371b38ea","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-07-05T17:17:38Z","title_canon_sha256":"2987fe0f326938b848e640de9e0607f34c860855ecef6b67a3ec9bea5d0eb5bf"},"schema_version":"1.0","source":{"id":"2407.04660","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.04660","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"arxiv_version","alias_value":"2407.04660v2","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.04660","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"pith_short_12","alias_value":"KJWYGGSD4ACP","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"pith_short_16","alias_value":"KJWYGGSD4ACPH5ZZ","created_at":"2026-07-05T10:48:17Z"},{"alias_kind":"pith_short_8","alias_value":"KJWYGGSD","created_at":"2026-07-05T10:48:17Z"}],"graph_snapshots":[{"event_id":"sha256:37472f42a39396d5a243b660654bd4e450d243b5a650201816b62e76ca3ffb66","target":"graph","created_at":"2026-07-05T10:48:17Z","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/2407.04660/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce COBRA (Cosmology with Optimally factorized Bases of Radial Approximants), a novel framework for rapid computation of large-scale structure observables. COBRA separates scale dependence from cosmological parameters in the linear matter power spectrum while also minimising the number of necessary basis terms $N_b$, thus enabling direct and efficient computation of derived and nonlinear observables. Moreover, the dependence on cosmological parameters is efficiently approximated using radial basis function interpolation. We apply our framework to decompose the linear matter power spec","authors_text":"Nora Elisa Chisari, Thomas Bakx, Zvonimir Vlah","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-07-05T17:17:38Z","title":"COBRA: Optimal Factorization of Cosmological Observables"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.04660","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":"sha256:758075adc834e3a1ce2be7312b68314524d8c9eacf7cb287044241c9dcc5c123","target":"record","created_at":"2026-07-05T10:48:17Z","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":"9ed3be30c8f0c7f73995bce66f9f9075aa3fc3a0a8b8bc0e2e2dadb8371b38ea","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-07-05T17:17:38Z","title_canon_sha256":"2987fe0f326938b848e640de9e0607f34c860855ecef6b67a3ec9bea5d0eb5bf"},"schema_version":"1.0","source":{"id":"2407.04660","kind":"arxiv","version":2}},"canonical_sha256":"526d831a43e004f3f73940ca46bb4bbc044e1139960ee7543dd18534231d2108","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"526d831a43e004f3f73940ca46bb4bbc044e1139960ee7543dd18534231d2108","first_computed_at":"2026-07-05T10:48:17.313822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:48:17.313822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BLhig2XF1RwVTvbqZ3AJlfu5mhGKQTAui5d7QMK9d3p72dXddfkogRKIKplswULB748STCLgd+MzyydNjfYtBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:48:17.314294Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.04660","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:758075adc834e3a1ce2be7312b68314524d8c9eacf7cb287044241c9dcc5c123","sha256:37472f42a39396d5a243b660654bd4e450d243b5a650201816b62e76ca3ffb66"],"state_sha256":"e3e19ab596e7dd3ef007c3125918696f122b1c4fc59683b70fa8b5fe5a148548"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"peEQ0yGkihIYBm8+Z1l7J0JWYWuPu8sglBZDDsVCZ5H8v67kyWMUbH+lUrh4xIRnwTM8VWPknOHwHwAYhPAYAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T21:37:50.823352Z","bundle_sha256":"67e985a6b7499831c213c2169bfba9275b53de76eff47cfaea3a147faa180002"}}