{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:D4MPWSSIYDTVOL53GHYWRNY24C","short_pith_number":"pith:D4MPWSSI","canonical_record":{"source":{"id":"1007.4141","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-07-23T14:37:29Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"7fa38e0822cdfe489596630c53f8ae8537f7874b51ed82c0c9b24cdfff4271b6","abstract_canon_sha256":"3c0234344b54bca1b2bf37c2d0db5bb1e09453737939117376d76138abded954"},"schema_version":"1.0"},"canonical_sha256":"1f18fb4a48c0e7572fbb31f168b71ae0bd785e96b540a1852e80951187387e6f","source":{"kind":"arxiv","id":"1007.4141","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.4141","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"arxiv_version","alias_value":"1007.4141v2","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.4141","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"pith_short_12","alias_value":"D4MPWSSIYDTV","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"D4MPWSSIYDTVOL53","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"D4MPWSSI","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:D4MPWSSIYDTVOL53GHYWRNY24C","target":"record","payload":{"canonical_record":{"source":{"id":"1007.4141","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-07-23T14:37:29Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"7fa38e0822cdfe489596630c53f8ae8537f7874b51ed82c0c9b24cdfff4271b6","abstract_canon_sha256":"3c0234344b54bca1b2bf37c2d0db5bb1e09453737939117376d76138abded954"},"schema_version":"1.0"},"canonical_sha256":"1f18fb4a48c0e7572fbb31f168b71ae0bd785e96b540a1852e80951187387e6f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:36:33.381393Z","signature_b64":"8EfLJB89TQUHf7ToFgr3iC6/mA25L8u1W4pbinyJFOMM6Rm6wlUNeUtVCMixIAZOc9On/Uko+v4rolNI+334Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f18fb4a48c0e7572fbb31f168b71ae0bd785e96b540a1852e80951187387e6f","last_reissued_at":"2026-05-18T04:36:33.380906Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:36:33.380906Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.4141","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":"2026-05-18T04:36:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jo+ridlqYcPwRSB2cLVvWmqQ2G3UMOwOX/778D/hoiLQ9IWRmP4eEAUlYZEUdtpFaXZl8u2sWdI418pmd6RjAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T19:52:06.511265Z"},"content_sha256":"64b4a24c9a710d84136e5168484a2cad42fbc562e9e185cd4f5e755935d360d2","schema_version":"1.0","event_id":"sha256:64b4a24c9a710d84136e5168484a2cad42fbc562e9e185cd4f5e755935d360d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:D4MPWSSIYDTVOL53GHYWRNY24C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"k-essence in the DGP brane-world cosmology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Luis Chimento, Mariam Bouhmadi-Lopez","submitted_at":"2010-07-23T14:37:29Z","abstract_excerpt":"We analyse a DGP brane filled with a k-essence field and assume the k-field evolving linearly with the cosmic time of the brane. We then solve analytically the Friedmann equation and deduce the different behaviour of the brane at the low and the high energy regimes. The asymptotic behaviour can be quite different involving accelerating branes, big bangs, big crunches, big rips or quiescent singularities. The latter correspond to a type of sudden singularity."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4141","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":"2026-05-18T04:36:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oY7CymqN+b02cBqrzMbuGA31TLSuzFJuG6H/CnM/sytGExIU4DFmtStYdHHurDfRvKnMaLd1E7Fb9dssptt0Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T19:52:06.511631Z"},"content_sha256":"ea98227fc59ccb37508d0b88dab9b156b7b1a0a3e0a5285b129c4fb1f596d079","schema_version":"1.0","event_id":"sha256:ea98227fc59ccb37508d0b88dab9b156b7b1a0a3e0a5285b129c4fb1f596d079"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D4MPWSSIYDTVOL53GHYWRNY24C/bundle.json","state_url":"https://pith.science/pith/D4MPWSSIYDTVOL53GHYWRNY24C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D4MPWSSIYDTVOL53GHYWRNY24C/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":"2026-07-02T19:52:06Z","links":{"resolver":"https://pith.science/pith/D4MPWSSIYDTVOL53GHYWRNY24C","bundle":"https://pith.science/pith/D4MPWSSIYDTVOL53GHYWRNY24C/bundle.json","state":"https://pith.science/pith/D4MPWSSIYDTVOL53GHYWRNY24C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D4MPWSSIYDTVOL53GHYWRNY24C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:D4MPWSSIYDTVOL53GHYWRNY24C","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":"3c0234344b54bca1b2bf37c2d0db5bb1e09453737939117376d76138abded954","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-07-23T14:37:29Z","title_canon_sha256":"7fa38e0822cdfe489596630c53f8ae8537f7874b51ed82c0c9b24cdfff4271b6"},"schema_version":"1.0","source":{"id":"1007.4141","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.4141","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"arxiv_version","alias_value":"1007.4141v2","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.4141","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"pith_short_12","alias_value":"D4MPWSSIYDTV","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"D4MPWSSIYDTVOL53","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"D4MPWSSI","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:ea98227fc59ccb37508d0b88dab9b156b7b1a0a3e0a5285b129c4fb1f596d079","target":"graph","created_at":"2026-05-18T04:36:33Z","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 analyse a DGP brane filled with a k-essence field and assume the k-field evolving linearly with the cosmic time of the brane. We then solve analytically the Friedmann equation and deduce the different behaviour of the brane at the low and the high energy regimes. The asymptotic behaviour can be quite different involving accelerating branes, big bangs, big crunches, big rips or quiescent singularities. The latter correspond to a type of sudden singularity.","authors_text":"Luis Chimento, Mariam Bouhmadi-Lopez","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-07-23T14:37:29Z","title":"k-essence in the DGP brane-world cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4141","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":"sha256:64b4a24c9a710d84136e5168484a2cad42fbc562e9e185cd4f5e755935d360d2","target":"record","created_at":"2026-05-18T04:36:33Z","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":"3c0234344b54bca1b2bf37c2d0db5bb1e09453737939117376d76138abded954","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-07-23T14:37:29Z","title_canon_sha256":"7fa38e0822cdfe489596630c53f8ae8537f7874b51ed82c0c9b24cdfff4271b6"},"schema_version":"1.0","source":{"id":"1007.4141","kind":"arxiv","version":2}},"canonical_sha256":"1f18fb4a48c0e7572fbb31f168b71ae0bd785e96b540a1852e80951187387e6f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f18fb4a48c0e7572fbb31f168b71ae0bd785e96b540a1852e80951187387e6f","first_computed_at":"2026-05-18T04:36:33.380906Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:36:33.380906Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8EfLJB89TQUHf7ToFgr3iC6/mA25L8u1W4pbinyJFOMM6Rm6wlUNeUtVCMixIAZOc9On/Uko+v4rolNI+334Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:36:33.381393Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.4141","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:64b4a24c9a710d84136e5168484a2cad42fbc562e9e185cd4f5e755935d360d2","sha256:ea98227fc59ccb37508d0b88dab9b156b7b1a0a3e0a5285b129c4fb1f596d079"],"state_sha256":"ce0981adca1d3573796134642ae2925c151d26bb8c175aa3943171e4cf050dc7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YKbBqrLbUwQjpDsP4HQK3bLYZJNTdUUeJzGPpv8MgBODfofITWSth3nLvINOApZVia+wds07NjmvFa5ZW5d5CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T19:52:06.513549Z","bundle_sha256":"9a9cf8234bc2aa5177387607a413aa48a2d9100433b4e34415daeda89daff769"}}