{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4BPHTKXKWNMBVFUQUC4UMLVSVS","short_pith_number":"pith:4BPHTKXK","canonical_record":{"source":{"id":"1809.09274","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-25T01:09:35Z","cross_cats_sorted":[],"title_canon_sha256":"36e81f1992d74a807c75afcc88973d48c3fb00f8c697918b3703885401b82533","abstract_canon_sha256":"c9b9d5ac35333d16be50db2d359f9eeb8229d649b63ca4399d9e89c7b0903241"},"schema_version":"1.0"},"canonical_sha256":"e05e79aaeab3581a9690a0b9462eb2aca4fa1e0706ca0467ae8688aa9a2245c1","source":{"kind":"arxiv","id":"1809.09274","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.09274","created_at":"2026-05-18T00:04:53Z"},{"alias_kind":"arxiv_version","alias_value":"1809.09274v1","created_at":"2026-05-18T00:04:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.09274","created_at":"2026-05-18T00:04:53Z"},{"alias_kind":"pith_short_12","alias_value":"4BPHTKXKWNMB","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4BPHTKXKWNMBVFUQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4BPHTKXK","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4BPHTKXKWNMBVFUQUC4UMLVSVS","target":"record","payload":{"canonical_record":{"source":{"id":"1809.09274","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-25T01:09:35Z","cross_cats_sorted":[],"title_canon_sha256":"36e81f1992d74a807c75afcc88973d48c3fb00f8c697918b3703885401b82533","abstract_canon_sha256":"c9b9d5ac35333d16be50db2d359f9eeb8229d649b63ca4399d9e89c7b0903241"},"schema_version":"1.0"},"canonical_sha256":"e05e79aaeab3581a9690a0b9462eb2aca4fa1e0706ca0467ae8688aa9a2245c1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:53.875507Z","signature_b64":"S+8yEw+al3Xs9XauykuPAbBs8pJjEi5igyijrHcKm5CA6wo61ujAX5+wWjiMlhZquqPRRI+NXioEu/jpIxYsCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e05e79aaeab3581a9690a0b9462eb2aca4fa1e0706ca0467ae8688aa9a2245c1","last_reissued_at":"2026-05-18T00:04:53.874873Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:53.874873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.09274","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":"2026-05-18T00:04:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VPaiLmMq6UVtUd8K7bpC+xeJECGvJyD6rpCeh0kxdwUGaCwTpGV40uH+Ha8zhaqTOlgnteONosWtc18YBh1RDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:21:32.947356Z"},"content_sha256":"6c7ea43a33368f501f35a585a32f41bdaf6b751201c2fadf83eb0cdbf7e8f854","schema_version":"1.0","event_id":"sha256:6c7ea43a33368f501f35a585a32f41bdaf6b751201c2fadf83eb0cdbf7e8f854"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4BPHTKXKWNMBVFUQUC4UMLVSVS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stealth's cosmologies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Abigail Alvarez, Cuauhtemoc Campuzano, Efra\\'in Rojas, V\\'ictor C\\'ardenas","submitted_at":"2018-09-25T01:09:35Z","abstract_excerpt":"We present a novel approach to construct cosmological models endowed with a particular scalar field, the stealth. The model is constructed by studying a scalar field no-minimally coupled to the gravitational field with sources; as sources, we used a perfect fluid and analyzed the simplest case of dust and the power-law cosmology. Surprisingly, we find that these stealth fields, which have no back-reaction to background space-time, have a contribution to cosmological dynamics. Furthermore, we provide analytic expressions of the stealth's contributions to the energy density in both cases, and fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.09274","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":"2026-05-18T00:04:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jjrbOq+euUF1qJSD6oRHywDPFHUBP1vYPhv5r1snbfsAGdyCEIKgROsIDBYAyh8VLJ3u/d+SONNaE77TdLN7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:21:32.947708Z"},"content_sha256":"b851488fa5a317862b3d5ac75fb4ae6fda72801fec1d19003dd9bd806a40eef1","schema_version":"1.0","event_id":"sha256:b851488fa5a317862b3d5ac75fb4ae6fda72801fec1d19003dd9bd806a40eef1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4BPHTKXKWNMBVFUQUC4UMLVSVS/bundle.json","state_url":"https://pith.science/pith/4BPHTKXKWNMBVFUQUC4UMLVSVS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4BPHTKXKWNMBVFUQUC4UMLVSVS/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":"2026-06-03T05:21:32Z","links":{"resolver":"https://pith.science/pith/4BPHTKXKWNMBVFUQUC4UMLVSVS","bundle":"https://pith.science/pith/4BPHTKXKWNMBVFUQUC4UMLVSVS/bundle.json","state":"https://pith.science/pith/4BPHTKXKWNMBVFUQUC4UMLVSVS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4BPHTKXKWNMBVFUQUC4UMLVSVS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4BPHTKXKWNMBVFUQUC4UMLVSVS","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":"c9b9d5ac35333d16be50db2d359f9eeb8229d649b63ca4399d9e89c7b0903241","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-25T01:09:35Z","title_canon_sha256":"36e81f1992d74a807c75afcc88973d48c3fb00f8c697918b3703885401b82533"},"schema_version":"1.0","source":{"id":"1809.09274","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.09274","created_at":"2026-05-18T00:04:53Z"},{"alias_kind":"arxiv_version","alias_value":"1809.09274v1","created_at":"2026-05-18T00:04:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.09274","created_at":"2026-05-18T00:04:53Z"},{"alias_kind":"pith_short_12","alias_value":"4BPHTKXKWNMB","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4BPHTKXKWNMBVFUQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4BPHTKXK","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:b851488fa5a317862b3d5ac75fb4ae6fda72801fec1d19003dd9bd806a40eef1","target":"graph","created_at":"2026-05-18T00:04:53Z","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 present a novel approach to construct cosmological models endowed with a particular scalar field, the stealth. The model is constructed by studying a scalar field no-minimally coupled to the gravitational field with sources; as sources, we used a perfect fluid and analyzed the simplest case of dust and the power-law cosmology. Surprisingly, we find that these stealth fields, which have no back-reaction to background space-time, have a contribution to cosmological dynamics. Furthermore, we provide analytic expressions of the stealth's contributions to the energy density in both cases, and fo","authors_text":"Abigail Alvarez, Cuauhtemoc Campuzano, Efra\\'in Rojas, V\\'ictor C\\'ardenas","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-25T01:09:35Z","title":"Stealth's cosmologies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.09274","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":"sha256:6c7ea43a33368f501f35a585a32f41bdaf6b751201c2fadf83eb0cdbf7e8f854","target":"record","created_at":"2026-05-18T00:04:53Z","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":"c9b9d5ac35333d16be50db2d359f9eeb8229d649b63ca4399d9e89c7b0903241","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-25T01:09:35Z","title_canon_sha256":"36e81f1992d74a807c75afcc88973d48c3fb00f8c697918b3703885401b82533"},"schema_version":"1.0","source":{"id":"1809.09274","kind":"arxiv","version":1}},"canonical_sha256":"e05e79aaeab3581a9690a0b9462eb2aca4fa1e0706ca0467ae8688aa9a2245c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e05e79aaeab3581a9690a0b9462eb2aca4fa1e0706ca0467ae8688aa9a2245c1","first_computed_at":"2026-05-18T00:04:53.874873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:53.874873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S+8yEw+al3Xs9XauykuPAbBs8pJjEi5igyijrHcKm5CA6wo61ujAX5+wWjiMlhZquqPRRI+NXioEu/jpIxYsCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:53.875507Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.09274","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6c7ea43a33368f501f35a585a32f41bdaf6b751201c2fadf83eb0cdbf7e8f854","sha256:b851488fa5a317862b3d5ac75fb4ae6fda72801fec1d19003dd9bd806a40eef1"],"state_sha256":"8ba6552ba37b3b1edf8ed79e82ff40371270cbd0cd2cbf7ccf2962d20b19a359"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JoLiQq8B6m+ETd3Ti4k90lm/LXRUKhoRLpHK1Sf60EwIJZ5fGOj+u96FHSxCSFrU2gUbkc+SBR7RQ1CPEy3JBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:21:32.949685Z","bundle_sha256":"1a1e1772c9bbc96a006494ad45dff65d75d3e25ce5cc4e6a15d6d375660ea416"}}