{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:MGWUO2DFCPAYIR6CE2X26ZRAQ6","short_pith_number":"pith:MGWUO2DF","canonical_record":{"source":{"id":"astro-ph/0208340","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-19T10:16:55Z","cross_cats_sorted":[],"title_canon_sha256":"72d165aca6a4d9c065e3ef6961dff58126e1b8a2cc9769a15b810c881a11616b","abstract_canon_sha256":"62edbd445a3871fcbd899e7862ef01b79863a405d5a111ad9ebb883d134a05fc"},"schema_version":"1.0"},"canonical_sha256":"61ad47686513c18447c226afaf662087a893b3c60fc494109a0fbee692580385","source":{"kind":"arxiv","id":"astro-ph/0208340","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0208340","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0208340v1","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0208340","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"pith_short_12","alias_value":"MGWUO2DFCPAY","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"MGWUO2DFCPAYIR6C","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"MGWUO2DF","created_at":"2026-05-18T12:25:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:MGWUO2DFCPAYIR6CE2X26ZRAQ6","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0208340","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-19T10:16:55Z","cross_cats_sorted":[],"title_canon_sha256":"72d165aca6a4d9c065e3ef6961dff58126e1b8a2cc9769a15b810c881a11616b","abstract_canon_sha256":"62edbd445a3871fcbd899e7862ef01b79863a405d5a111ad9ebb883d134a05fc"},"schema_version":"1.0"},"canonical_sha256":"61ad47686513c18447c226afaf662087a893b3c60fc494109a0fbee692580385","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:05.541499Z","signature_b64":"dvVl8mil8UCqzWfZoy+ypVr8w+HG/PE/PJF7HJrKJyllEdGPCvBbMG0+7KIPyBO+UGSv/tLhaclecXJA6kQQCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"61ad47686513c18447c226afaf662087a893b3c60fc494109a0fbee692580385","last_reissued_at":"2026-05-18T00:21:05.540923Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:05.540923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0208340","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":"2026-05-18T00:21:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0uNQuR6hLhlo7Btf/49gdRbn0EiPRNCFSASGNkj6Lt7TebBMxpgy7SCieOqjpf59RnvOvQeozTX8JB7RdNrRBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:59:07.055688Z"},"content_sha256":"a666680b8772032e8afb599b3fd140e935e7e7c8972ec24f3a3bc89fe8febc2c","schema_version":"1.0","event_id":"sha256:a666680b8772032e8afb599b3fd140e935e7e7c8972ec24f3a3bc89fe8febc2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:MGWUO2DFCPAYIR6CE2X26ZRAQ6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Effects of Shear and Rotation Anisotropy Upon the Process of Gravitational Instability","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2, (2) Feza Gursey Institute, 3), (3) Bogazici University, A. Del Popolo (1, E. N. Ercan (3), Istanbul, Italy, M. Gambera (1) ((1) Bergamo University, Turkey, Turkey)","submitted_at":"2002-08-19T10:16:55Z","abstract_excerpt":"In this paper, we study the role of shear fields on the evolution of density perturbations embedded in a Friedmann flat background universe, by studying the evolution of a homogeneous ellipsoid model. In this context, we show that while the effect of the shear is that of increasing the growth rate of the density contrast of a mass element, the angular momentum acquired by the ellipsoid has the right magnitude to counterbalance the shear. Finally, our result show that initial asphericities and tidal interaction induce a slowing down of the collapse after the system has broken away from the gene"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0208340","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":"2026-05-18T00:21:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sJWQCOl5B15QQGpdB7Ne/e44EwHgEApqu8S3l5kUn3EsmlDy/wzthfXtuVbzkzDN20KxMyU3rN/a420owvUwBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:59:07.056283Z"},"content_sha256":"1730a6f92eb8ca2f0f89f553b7fc41443e8bb7a7634ac3ba833b325948ddcaea","schema_version":"1.0","event_id":"sha256:1730a6f92eb8ca2f0f89f553b7fc41443e8bb7a7634ac3ba833b325948ddcaea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MGWUO2DFCPAYIR6CE2X26ZRAQ6/bundle.json","state_url":"https://pith.science/pith/MGWUO2DFCPAYIR6CE2X26ZRAQ6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MGWUO2DFCPAYIR6CE2X26ZRAQ6/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":"2026-05-28T02:59:07Z","links":{"resolver":"https://pith.science/pith/MGWUO2DFCPAYIR6CE2X26ZRAQ6","bundle":"https://pith.science/pith/MGWUO2DFCPAYIR6CE2X26ZRAQ6/bundle.json","state":"https://pith.science/pith/MGWUO2DFCPAYIR6CE2X26ZRAQ6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MGWUO2DFCPAYIR6CE2X26ZRAQ6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:MGWUO2DFCPAYIR6CE2X26ZRAQ6","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":"62edbd445a3871fcbd899e7862ef01b79863a405d5a111ad9ebb883d134a05fc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-19T10:16:55Z","title_canon_sha256":"72d165aca6a4d9c065e3ef6961dff58126e1b8a2cc9769a15b810c881a11616b"},"schema_version":"1.0","source":{"id":"astro-ph/0208340","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0208340","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0208340v1","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0208340","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"pith_short_12","alias_value":"MGWUO2DFCPAY","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"MGWUO2DFCPAYIR6C","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"MGWUO2DF","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:1730a6f92eb8ca2f0f89f553b7fc41443e8bb7a7634ac3ba833b325948ddcaea","target":"graph","created_at":"2026-05-18T00:21:05Z","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":"In this paper, we study the role of shear fields on the evolution of density perturbations embedded in a Friedmann flat background universe, by studying the evolution of a homogeneous ellipsoid model. In this context, we show that while the effect of the shear is that of increasing the growth rate of the density contrast of a mass element, the angular momentum acquired by the ellipsoid has the right magnitude to counterbalance the shear. Finally, our result show that initial asphericities and tidal interaction induce a slowing down of the collapse after the system has broken away from the gene","authors_text":"2, (2) Feza Gursey Institute, 3), (3) Bogazici University, A. Del Popolo (1, E. N. Ercan (3), Istanbul, Italy, M. Gambera (1) ((1) Bergamo University, Turkey, Turkey)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-08-19T10:16:55Z","title":"The Effects of Shear and Rotation Anisotropy Upon the Process of Gravitational Instability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0208340","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:a666680b8772032e8afb599b3fd140e935e7e7c8972ec24f3a3bc89fe8febc2c","target":"record","created_at":"2026-05-18T00:21:05Z","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":"62edbd445a3871fcbd899e7862ef01b79863a405d5a111ad9ebb883d134a05fc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-19T10:16:55Z","title_canon_sha256":"72d165aca6a4d9c065e3ef6961dff58126e1b8a2cc9769a15b810c881a11616b"},"schema_version":"1.0","source":{"id":"astro-ph/0208340","kind":"arxiv","version":1}},"canonical_sha256":"61ad47686513c18447c226afaf662087a893b3c60fc494109a0fbee692580385","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"61ad47686513c18447c226afaf662087a893b3c60fc494109a0fbee692580385","first_computed_at":"2026-05-18T00:21:05.540923Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:05.540923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dvVl8mil8UCqzWfZoy+ypVr8w+HG/PE/PJF7HJrKJyllEdGPCvBbMG0+7KIPyBO+UGSv/tLhaclecXJA6kQQCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:05.541499Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0208340","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a666680b8772032e8afb599b3fd140e935e7e7c8972ec24f3a3bc89fe8febc2c","sha256:1730a6f92eb8ca2f0f89f553b7fc41443e8bb7a7634ac3ba833b325948ddcaea"],"state_sha256":"c38f8975f787a36033f741105aa4b442b10b30b1fb23a9c5792899dc254a9f1d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yEol53GB0nxifrxATWZ+/MxmXnui2o/qw2lNqdhtLVw4mpQpxl3kvMqf9ysMWTTEYJiNBWoA5eH16/TFImeYBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T02:59:07.059065Z","bundle_sha256":"6b84eb93f6260fc59a52d91254e6c4542ef863c674bb702aa976775c1d89f8ac"}}