{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:LENVQ33XMGD3UJ7U6LKCAQW5HH","short_pith_number":"pith:LENVQ33X","canonical_record":{"source":{"id":"1503.01684","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-05T16:45:00Z","cross_cats_sorted":[],"title_canon_sha256":"fc026bdf8fdc0e95ff8de1a28390d0c6a2115cfdee2234d7b47601bcd32368f6","abstract_canon_sha256":"ff9f0e776f36dd44ab2542105a4a7146cf7881cf80cac8e84b13d696995399f5"},"schema_version":"1.0"},"canonical_sha256":"591b586f776187ba27f4f2d42042dd39d367a924ce6d8eb169badc8519ea9af8","source":{"kind":"arxiv","id":"1503.01684","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.01684","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"arxiv_version","alias_value":"1503.01684v1","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.01684","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"pith_short_12","alias_value":"LENVQ33XMGD3","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LENVQ33XMGD3UJ7U","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LENVQ33X","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:LENVQ33XMGD3UJ7U6LKCAQW5HH","target":"record","payload":{"canonical_record":{"source":{"id":"1503.01684","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-05T16:45:00Z","cross_cats_sorted":[],"title_canon_sha256":"fc026bdf8fdc0e95ff8de1a28390d0c6a2115cfdee2234d7b47601bcd32368f6","abstract_canon_sha256":"ff9f0e776f36dd44ab2542105a4a7146cf7881cf80cac8e84b13d696995399f5"},"schema_version":"1.0"},"canonical_sha256":"591b586f776187ba27f4f2d42042dd39d367a924ce6d8eb169badc8519ea9af8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:24.388805Z","signature_b64":"nAiTZu1ggb12oHR/u6T8WY7IidA+b0saSyQY8NogJjR7eVFUg+t0PDOLVuPliQdC2zfLjyC1A77yVqOO/Iw3Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"591b586f776187ba27f4f2d42042dd39d367a924ce6d8eb169badc8519ea9af8","last_reissued_at":"2026-05-18T01:34:24.388355Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:24.388355Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.01684","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":"2026-05-18T01:34:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V3xWkosejyhqEcO9zyiX/PEhyq6SMBp9nqshiA2g0rPjESJxBOi+iJEQOQvTbH9wJWf7cVKZz9gl+ej28b9SCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:44:31.970764Z"},"content_sha256":"a273e63299f273f3031e6a092d79b10ee66b4fb79da58152fa2f40a0eb511907","schema_version":"1.0","event_id":"sha256:a273e63299f273f3031e6a092d79b10ee66b4fb79da58152fa2f40a0eb511907"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:LENVQ33XMGD3UJ7U6LKCAQW5HH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Doubly-boosted vector cosmologies from disformal metrics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Federico R. Urban, Tomi S. Koivisto","submitted_at":"2015-03-05T16:45:00Z","abstract_excerpt":"A systematic dynamical system approach is applied to study the cosmology of anisotropic Bianchi I universes in which a vector field is assumed to operate on a disformal frame. This study yields a number of new fixed points, among which anisotropic scaling solutions. Within the simplifying assumption of (nearly) constant-slope potentials these are either not stable attractors, do not describe accelerating expansion or else they feature too large anisotropies to be compatible with observations. Nonetheless, some solutions do have an appeal for cosmological applications in that isotropy is retain"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.01684","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":"2026-05-18T01:34:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6GZCP0w2jhie7gvzOZWBUXUgxHRITslMeOfzrUO6x+aEp7guu4bwsy7wexjJzyuS8Obxko+58kfsxZXr85NIDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:44:31.972192Z"},"content_sha256":"951e4e2d3e7bedd6ba07e4615996f9e63a77a031c29b4f90bb5f8e128c2e5976","schema_version":"1.0","event_id":"sha256:951e4e2d3e7bedd6ba07e4615996f9e63a77a031c29b4f90bb5f8e128c2e5976"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LENVQ33XMGD3UJ7U6LKCAQW5HH/bundle.json","state_url":"https://pith.science/pith/LENVQ33XMGD3UJ7U6LKCAQW5HH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LENVQ33XMGD3UJ7U6LKCAQW5HH/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":"2026-05-30T16:44:31Z","links":{"resolver":"https://pith.science/pith/LENVQ33XMGD3UJ7U6LKCAQW5HH","bundle":"https://pith.science/pith/LENVQ33XMGD3UJ7U6LKCAQW5HH/bundle.json","state":"https://pith.science/pith/LENVQ33XMGD3UJ7U6LKCAQW5HH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LENVQ33XMGD3UJ7U6LKCAQW5HH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LENVQ33XMGD3UJ7U6LKCAQW5HH","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":"ff9f0e776f36dd44ab2542105a4a7146cf7881cf80cac8e84b13d696995399f5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-05T16:45:00Z","title_canon_sha256":"fc026bdf8fdc0e95ff8de1a28390d0c6a2115cfdee2234d7b47601bcd32368f6"},"schema_version":"1.0","source":{"id":"1503.01684","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.01684","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"arxiv_version","alias_value":"1503.01684v1","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.01684","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"pith_short_12","alias_value":"LENVQ33XMGD3","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LENVQ33XMGD3UJ7U","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LENVQ33X","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:951e4e2d3e7bedd6ba07e4615996f9e63a77a031c29b4f90bb5f8e128c2e5976","target":"graph","created_at":"2026-05-18T01:34:24Z","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":"A systematic dynamical system approach is applied to study the cosmology of anisotropic Bianchi I universes in which a vector field is assumed to operate on a disformal frame. This study yields a number of new fixed points, among which anisotropic scaling solutions. Within the simplifying assumption of (nearly) constant-slope potentials these are either not stable attractors, do not describe accelerating expansion or else they feature too large anisotropies to be compatible with observations. Nonetheless, some solutions do have an appeal for cosmological applications in that isotropy is retain","authors_text":"Federico R. Urban, Tomi S. Koivisto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-05T16:45:00Z","title":"Doubly-boosted vector cosmologies from disformal metrics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.01684","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:a273e63299f273f3031e6a092d79b10ee66b4fb79da58152fa2f40a0eb511907","target":"record","created_at":"2026-05-18T01:34:24Z","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":"ff9f0e776f36dd44ab2542105a4a7146cf7881cf80cac8e84b13d696995399f5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-05T16:45:00Z","title_canon_sha256":"fc026bdf8fdc0e95ff8de1a28390d0c6a2115cfdee2234d7b47601bcd32368f6"},"schema_version":"1.0","source":{"id":"1503.01684","kind":"arxiv","version":1}},"canonical_sha256":"591b586f776187ba27f4f2d42042dd39d367a924ce6d8eb169badc8519ea9af8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"591b586f776187ba27f4f2d42042dd39d367a924ce6d8eb169badc8519ea9af8","first_computed_at":"2026-05-18T01:34:24.388355Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:24.388355Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nAiTZu1ggb12oHR/u6T8WY7IidA+b0saSyQY8NogJjR7eVFUg+t0PDOLVuPliQdC2zfLjyC1A77yVqOO/Iw3Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:24.388805Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.01684","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a273e63299f273f3031e6a092d79b10ee66b4fb79da58152fa2f40a0eb511907","sha256:951e4e2d3e7bedd6ba07e4615996f9e63a77a031c29b4f90bb5f8e128c2e5976"],"state_sha256":"c515acbca6e60e7d112c1e1637bed94c53abc2826f6c2e46f2af007f6f1c38ad"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"onB7WIPgamN5Zx/0juq34pLamYcWgETxi+avr4LpSEkCcqXo2Eko/JcMxCWsDoX1FwYrGI8B2//X1E/0beYeAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T16:44:31.977505Z","bundle_sha256":"1f0c1959e5c5cf7fdd4adf771b974a6915deda71fa54e93ce7a21b58f1e74365"}}