{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SX46MX7YMQFIBGH7ZOOLLHFDYX","short_pith_number":"pith:SX46MX7Y","canonical_record":{"source":{"id":"1905.02441","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-05-07T09:48:07Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"77ad724672db1dae2b9ea2b005dac06715ebcd43ccf745401c3b73f27ce751f3","abstract_canon_sha256":"bf98c0d1a3de67ac2e08e99e7b8cf238c8e75b37ac12762f17b877cb83d24e76"},"schema_version":"1.0"},"canonical_sha256":"95f9e65ff8640a8098ffcb9cb59ca3c5c81f29687a576ae22a07f993015332b6","source":{"kind":"arxiv","id":"1905.02441","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.02441","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"1905.02441v2","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.02441","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"SX46MX7YMQFI","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"SX46MX7YMQFIBGH7","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"SX46MX7Y","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SX46MX7YMQFIBGH7ZOOLLHFDYX","target":"record","payload":{"canonical_record":{"source":{"id":"1905.02441","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-05-07T09:48:07Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"77ad724672db1dae2b9ea2b005dac06715ebcd43ccf745401c3b73f27ce751f3","abstract_canon_sha256":"bf98c0d1a3de67ac2e08e99e7b8cf238c8e75b37ac12762f17b877cb83d24e76"},"schema_version":"1.0"},"canonical_sha256":"95f9e65ff8640a8098ffcb9cb59ca3c5c81f29687a576ae22a07f993015332b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:08.767305Z","signature_b64":"P5sakRk8vGfDJikx9u3Fsf0uWu41Ko7nAWTNIeFjJqWRtE4dPJEozL5Yu1kZGvmVTbMEAr05ft4iuVOOC+M+BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95f9e65ff8640a8098ffcb9cb59ca3c5c81f29687a576ae22a07f993015332b6","last_reissued_at":"2026-05-17T23:41:08.766581Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:08.766581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.02441","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":"2026-05-17T23:41:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yuP/0Rp8rvCq2nE+m1qyvPOy5mvQIAyYeU3FhA+rdlxenVtphRY+ccEsv/Ub7jI4KiJ5R0Htsyl6S72V3ZWWBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T03:39:03.037763Z"},"content_sha256":"a7cfa98af39586df0f7c90de8f7b4ce8d2c76a6de02d63a0abe2eb637a590940","schema_version":"1.0","event_id":"sha256:a7cfa98af39586df0f7c90de8f7b4ce8d2c76a6de02d63a0abe2eb637a590940"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SX46MX7YMQFIBGH7ZOOLLHFDYX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revisiting Ryskin's Model of Cosmic Acceleration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Han Gao, Haoting Xu, Zhiqi Huang","submitted_at":"2019-05-07T09:48:07Z","abstract_excerpt":"Cosmic backreaction as an additional source of the expansion of the universe has been a debate topic since the discovery of cosmic acceleration. The major concern is whether the self interaction of small-scale nonlinear structures would source gravity on very large scales. Gregory Ryskin argued against the additional inclusion of gravitational interaction energy of astronomical objects, whose masses are mostly inferred from gravitational effects and hence should already contain all sources with long-range gravity forces. Ryskin proposed that the backreaction contribution to the energy momentum"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.02441","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":""},"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":"2026-05-17T23:41:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"modSUsE4wkTBOcxLNAq+4wnxRCuzGtL3tYh81nQ3lZwF2cg1+3xGdMeah/hiIZek5bWwvBFlbTK5nmBEkKgcCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T03:39:03.038535Z"},"content_sha256":"e2e3ea13a816d67a8c1d26cacd7b7c13d01ee69d9532a0210a00475b7b13ed25","schema_version":"1.0","event_id":"sha256:e2e3ea13a816d67a8c1d26cacd7b7c13d01ee69d9532a0210a00475b7b13ed25"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SX46MX7YMQFIBGH7ZOOLLHFDYX/bundle.json","state_url":"https://pith.science/pith/SX46MX7YMQFIBGH7ZOOLLHFDYX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SX46MX7YMQFIBGH7ZOOLLHFDYX/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":"2026-06-09T03:39:03Z","links":{"resolver":"https://pith.science/pith/SX46MX7YMQFIBGH7ZOOLLHFDYX","bundle":"https://pith.science/pith/SX46MX7YMQFIBGH7ZOOLLHFDYX/bundle.json","state":"https://pith.science/pith/SX46MX7YMQFIBGH7ZOOLLHFDYX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SX46MX7YMQFIBGH7ZOOLLHFDYX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SX46MX7YMQFIBGH7ZOOLLHFDYX","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":"bf98c0d1a3de67ac2e08e99e7b8cf238c8e75b37ac12762f17b877cb83d24e76","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-05-07T09:48:07Z","title_canon_sha256":"77ad724672db1dae2b9ea2b005dac06715ebcd43ccf745401c3b73f27ce751f3"},"schema_version":"1.0","source":{"id":"1905.02441","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.02441","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"1905.02441v2","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.02441","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"SX46MX7YMQFI","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"SX46MX7YMQFIBGH7","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"SX46MX7Y","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:e2e3ea13a816d67a8c1d26cacd7b7c13d01ee69d9532a0210a00475b7b13ed25","target":"graph","created_at":"2026-05-17T23:41:08Z","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":"Cosmic backreaction as an additional source of the expansion of the universe has been a debate topic since the discovery of cosmic acceleration. The major concern is whether the self interaction of small-scale nonlinear structures would source gravity on very large scales. Gregory Ryskin argued against the additional inclusion of gravitational interaction energy of astronomical objects, whose masses are mostly inferred from gravitational effects and hence should already contain all sources with long-range gravity forces. Ryskin proposed that the backreaction contribution to the energy momentum","authors_text":"Han Gao, Haoting Xu, Zhiqi Huang","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-05-07T09:48:07Z","title":"Revisiting Ryskin's Model of Cosmic Acceleration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.02441","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:a7cfa98af39586df0f7c90de8f7b4ce8d2c76a6de02d63a0abe2eb637a590940","target":"record","created_at":"2026-05-17T23:41:08Z","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":"bf98c0d1a3de67ac2e08e99e7b8cf238c8e75b37ac12762f17b877cb83d24e76","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-05-07T09:48:07Z","title_canon_sha256":"77ad724672db1dae2b9ea2b005dac06715ebcd43ccf745401c3b73f27ce751f3"},"schema_version":"1.0","source":{"id":"1905.02441","kind":"arxiv","version":2}},"canonical_sha256":"95f9e65ff8640a8098ffcb9cb59ca3c5c81f29687a576ae22a07f993015332b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95f9e65ff8640a8098ffcb9cb59ca3c5c81f29687a576ae22a07f993015332b6","first_computed_at":"2026-05-17T23:41:08.766581Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:08.766581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P5sakRk8vGfDJikx9u3Fsf0uWu41Ko7nAWTNIeFjJqWRtE4dPJEozL5Yu1kZGvmVTbMEAr05ft4iuVOOC+M+BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:08.767305Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.02441","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a7cfa98af39586df0f7c90de8f7b4ce8d2c76a6de02d63a0abe2eb637a590940","sha256:e2e3ea13a816d67a8c1d26cacd7b7c13d01ee69d9532a0210a00475b7b13ed25"],"state_sha256":"7c52353ffeba6eaeb89cf3799788af4514b06f2bf03a81388f60835214283b96"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kDECdQZ9DuLoI31f9FyqdbrVXYcMlBT4lTCKWEKVgIXPzqE6hYeCaIo6RvTND4vh47kBa6/bEbmQRtIdVOUMDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T03:39:03.045880Z","bundle_sha256":"93374863dba0136edea5732db9d32b3034176e4a4070fc309705646190dfb640"}}