{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:AZ6ZCEFZEIIZ6WCO4HZU5DH7YI","short_pith_number":"pith:AZ6ZCEFZ","canonical_record":{"source":{"id":"1804.04060","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-04-11T15:54:37Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"4b2639e657095cee8bf0fc958f7e17d058529c1d3d87a9565a8146a409afa605","abstract_canon_sha256":"9d11ebfdaf20517b97a0b142c02c9beddcf352c5422706a8589285269553c87f"},"schema_version":"1.0"},"canonical_sha256":"067d9110b922119f584ee1f34e8cffc225d40c49494b5924522e6b9ef8522f35","source":{"kind":"arxiv","id":"1804.04060","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04060","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04060v1","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04060","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"pith_short_12","alias_value":"AZ6ZCEFZEIIZ","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AZ6ZCEFZEIIZ6WCO","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AZ6ZCEFZ","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:AZ6ZCEFZEIIZ6WCO4HZU5DH7YI","target":"record","payload":{"canonical_record":{"source":{"id":"1804.04060","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-04-11T15:54:37Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"4b2639e657095cee8bf0fc958f7e17d058529c1d3d87a9565a8146a409afa605","abstract_canon_sha256":"9d11ebfdaf20517b97a0b142c02c9beddcf352c5422706a8589285269553c87f"},"schema_version":"1.0"},"canonical_sha256":"067d9110b922119f584ee1f34e8cffc225d40c49494b5924522e6b9ef8522f35","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:09.264713Z","signature_b64":"qh27XHLuwUvjtlbqUhfhW0uryu748TfOREry9UFif71aoEeuXIBhLG6KwvpL7KylBzrJucAQvoYqSFY4sadjCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"067d9110b922119f584ee1f34e8cffc225d40c49494b5924522e6b9ef8522f35","last_reissued_at":"2026-05-17T23:59:09.264260Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:09.264260Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.04060","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":"2026-05-17T23:59:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oUU6YYBv5LlMhIIa7/9h3GVilMY0OZZGglrVvp1I63mCO3dPG5qEoRIcmZaeLvINt7sXluD4QnQmF5vA/qbvBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:58:35.686731Z"},"content_sha256":"c6b29a9636ddbfc89794b3f7dadade51fdb12759c2791b74fe43055097fc71f9","schema_version":"1.0","event_id":"sha256:c6b29a9636ddbfc89794b3f7dadade51fdb12759c2791b74fe43055097fc71f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:AZ6ZCEFZEIIZ6WCO4HZU5DH7YI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Axial quasi-normal modes of neutron stars in $R^2$ gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Daniela D. Doneva, Jose Luis Bl\\'azquez-Salcedo, Jutta Kunz, Kalin V. Staykov, Stoytcho S. Yazadjiev","submitted_at":"2018-04-11T15:54:37Z","abstract_excerpt":"In the present paper the axial quasi-normal modes of neutron stars in $f(R)$ gravity are examined using a large set of equations of state. The numerical calculations are made using two different approaches -- performing time evolution of the perturbation equations and solving the time-independent representation of the equations as a boundary value problem. According to the results the mode frequencies and the damping times decrease with the increase of the free parameter of the theory in comparison to the pure general relativistic case. While the frequencies deviate significantly from Einstein"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04060","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":"2026-05-17T23:59:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KmSVX0vq2BH4OYbIJNUip9NCuVHaCxZaljFPNNDCTzf47h1FPG0Hkq2onRbmOaZ2fYzMepN+Ff5gbj8i8RWHDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:58:35.687404Z"},"content_sha256":"d5d543409db3c0d569d2240ed223fa2eabe4b44d93fb52668d2fb08cf33fac63","schema_version":"1.0","event_id":"sha256:d5d543409db3c0d569d2240ed223fa2eabe4b44d93fb52668d2fb08cf33fac63"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AZ6ZCEFZEIIZ6WCO4HZU5DH7YI/bundle.json","state_url":"https://pith.science/pith/AZ6ZCEFZEIIZ6WCO4HZU5DH7YI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AZ6ZCEFZEIIZ6WCO4HZU5DH7YI/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":"2026-05-26T21:58:35Z","links":{"resolver":"https://pith.science/pith/AZ6ZCEFZEIIZ6WCO4HZU5DH7YI","bundle":"https://pith.science/pith/AZ6ZCEFZEIIZ6WCO4HZU5DH7YI/bundle.json","state":"https://pith.science/pith/AZ6ZCEFZEIIZ6WCO4HZU5DH7YI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AZ6ZCEFZEIIZ6WCO4HZU5DH7YI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AZ6ZCEFZEIIZ6WCO4HZU5DH7YI","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":"9d11ebfdaf20517b97a0b142c02c9beddcf352c5422706a8589285269553c87f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-04-11T15:54:37Z","title_canon_sha256":"4b2639e657095cee8bf0fc958f7e17d058529c1d3d87a9565a8146a409afa605"},"schema_version":"1.0","source":{"id":"1804.04060","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04060","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04060v1","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04060","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"pith_short_12","alias_value":"AZ6ZCEFZEIIZ","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AZ6ZCEFZEIIZ6WCO","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AZ6ZCEFZ","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:d5d543409db3c0d569d2240ed223fa2eabe4b44d93fb52668d2fb08cf33fac63","target":"graph","created_at":"2026-05-17T23:59:09Z","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 the present paper the axial quasi-normal modes of neutron stars in $f(R)$ gravity are examined using a large set of equations of state. The numerical calculations are made using two different approaches -- performing time evolution of the perturbation equations and solving the time-independent representation of the equations as a boundary value problem. According to the results the mode frequencies and the damping times decrease with the increase of the free parameter of the theory in comparison to the pure general relativistic case. While the frequencies deviate significantly from Einstein","authors_text":"Daniela D. Doneva, Jose Luis Bl\\'azquez-Salcedo, Jutta Kunz, Kalin V. Staykov, Stoytcho S. Yazadjiev","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-04-11T15:54:37Z","title":"Axial quasi-normal modes of neutron stars in $R^2$ gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04060","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:c6b29a9636ddbfc89794b3f7dadade51fdb12759c2791b74fe43055097fc71f9","target":"record","created_at":"2026-05-17T23:59:09Z","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":"9d11ebfdaf20517b97a0b142c02c9beddcf352c5422706a8589285269553c87f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-04-11T15:54:37Z","title_canon_sha256":"4b2639e657095cee8bf0fc958f7e17d058529c1d3d87a9565a8146a409afa605"},"schema_version":"1.0","source":{"id":"1804.04060","kind":"arxiv","version":1}},"canonical_sha256":"067d9110b922119f584ee1f34e8cffc225d40c49494b5924522e6b9ef8522f35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"067d9110b922119f584ee1f34e8cffc225d40c49494b5924522e6b9ef8522f35","first_computed_at":"2026-05-17T23:59:09.264260Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:09.264260Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qh27XHLuwUvjtlbqUhfhW0uryu748TfOREry9UFif71aoEeuXIBhLG6KwvpL7KylBzrJucAQvoYqSFY4sadjCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:09.264713Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.04060","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c6b29a9636ddbfc89794b3f7dadade51fdb12759c2791b74fe43055097fc71f9","sha256:d5d543409db3c0d569d2240ed223fa2eabe4b44d93fb52668d2fb08cf33fac63"],"state_sha256":"294e2c99a48b1546f5d7c4a7cdd9a0f8b82c106da56ae6346accff1cebae51df"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tIYHhIImQySGdMWbY46VWSKAWftieivhnWPblgnCsCxHfyfTQouc4ACwI6JJnfrg20dZaiHCTvjs6f8MAUz0BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:58:35.690627Z","bundle_sha256":"d44aedb7039585800f1280bd46e82864226151490400223422ab836d512dd9ba"}}