{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:G56RH5PSEKXBIKL2GRXRJ4GGW7","short_pith_number":"pith:G56RH5PS","canonical_record":{"source":{"id":"1910.01104","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-02T17:54:16Z","cross_cats_sorted":["gr-qc","physics.comp-ph"],"title_canon_sha256":"8d6bbade10c9cac99c77b7c834c5a19e826a6f0c1cd8d5c5fa7e3f847edfb7e2","abstract_canon_sha256":"52fc71513626ab6610f64430d338a4895f37da85860c6fb0f083bf3fef93254b"},"schema_version":"1.0"},"canonical_sha256":"377d13f5f222ae14297a346f14f0c6b7c34e4efb48fd47cc6d2671fe5f5f3204","source":{"kind":"arxiv","id":"1910.01104","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.01104","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"arxiv_version","alias_value":"1910.01104v3","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.01104","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"pith_short_12","alias_value":"G56RH5PSEKXB","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"pith_short_16","alias_value":"G56RH5PSEKXBIKL2","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"pith_short_8","alias_value":"G56RH5PS","created_at":"2026-07-05T06:11:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:G56RH5PSEKXBIKL2GRXRJ4GGW7","target":"record","payload":{"canonical_record":{"source":{"id":"1910.01104","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-02T17:54:16Z","cross_cats_sorted":["gr-qc","physics.comp-ph"],"title_canon_sha256":"8d6bbade10c9cac99c77b7c834c5a19e826a6f0c1cd8d5c5fa7e3f847edfb7e2","abstract_canon_sha256":"52fc71513626ab6610f64430d338a4895f37da85860c6fb0f083bf3fef93254b"},"schema_version":"1.0"},"canonical_sha256":"377d13f5f222ae14297a346f14f0c6b7c34e4efb48fd47cc6d2671fe5f5f3204","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:11:52.349608Z","signature_b64":"ka/TClczoqBV3KonCPbdON34EEeNX9hDw3T5gopMgEtcTH457VGfoSPdsMLSMdvQOqA0aRyHfLdbPpaO9n0VDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"377d13f5f222ae14297a346f14f0c6b7c34e4efb48fd47cc6d2671fe5f5f3204","last_reissued_at":"2026-07-05T06:11:52.349117Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:11:52.349117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1910.01104","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:11:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O0SNcWVT0tdZUUUpWXn4IA8ZC402CaIqBECnvHz3c0yH92I6yY9Le7LzbKGcxgSwUcyXpS+Zv8fV/xAUC/VXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T18:05:59.648599Z"},"content_sha256":"9f2e64b1fcfff55f56a9504ee50c4eccf103d3238403b2d0704e44d6c1f0ffcb","schema_version":"1.0","event_id":"sha256:9f2e64b1fcfff55f56a9504ee50c4eccf103d3238403b2d0704e44d6c1f0ffcb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:G56RH5PSEKXBIKL2GRXRJ4GGW7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"$k$-evolution: a relativistic N-body code for clustering dark energy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","physics.comp-ph"],"primary_cat":"astro-ph.CO","authors_text":"Farbod Hassani, Filippo Vernizzi, Julian Adamek, Martin Kunz","submitted_at":"2019-10-02T17:54:16Z","abstract_excerpt":"We introduce $k$-evolution, a relativistic $N$-body code based on $\\textit{gevolution}$, which includes clustering dark energy among its cosmological components. To describe dark energy, we use the effective field theory approach. In particular, we focus on $k$-essence with a speed of sound much smaller than unity but we lay down the basis to extend the code to other dark energy and modified gravity models. We develop the formalism including dark energy non-linearities but, as a first step, we implement the equations in the code after dropping non-linear self-coupling in the $k$-essence field."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.01104","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1910.01104/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T06:11:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2IBbU4jkbnp7JlHF4jNU+KKwBV8vmuvAmX0OhGNeMT1Uj72VcUar2MHIL1gN66EsJ1NEyE6Li0Om8z5kCXQcBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T18:05:59.648950Z"},"content_sha256":"4a2b5b2c1dd9dbb1685b1f2cee0e785d421e8071b66f1ac557c4ddfad53ed855","schema_version":"1.0","event_id":"sha256:4a2b5b2c1dd9dbb1685b1f2cee0e785d421e8071b66f1ac557c4ddfad53ed855"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G56RH5PSEKXBIKL2GRXRJ4GGW7/bundle.json","state_url":"https://pith.science/pith/G56RH5PSEKXBIKL2GRXRJ4GGW7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G56RH5PSEKXBIKL2GRXRJ4GGW7/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":"2026-08-11T18:05:59Z","links":{"resolver":"https://pith.science/pith/G56RH5PSEKXBIKL2GRXRJ4GGW7","bundle":"https://pith.science/pith/G56RH5PSEKXBIKL2GRXRJ4GGW7/bundle.json","state":"https://pith.science/pith/G56RH5PSEKXBIKL2GRXRJ4GGW7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G56RH5PSEKXBIKL2GRXRJ4GGW7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:G56RH5PSEKXBIKL2GRXRJ4GGW7","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":"52fc71513626ab6610f64430d338a4895f37da85860c6fb0f083bf3fef93254b","cross_cats_sorted":["gr-qc","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-02T17:54:16Z","title_canon_sha256":"8d6bbade10c9cac99c77b7c834c5a19e826a6f0c1cd8d5c5fa7e3f847edfb7e2"},"schema_version":"1.0","source":{"id":"1910.01104","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.01104","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"arxiv_version","alias_value":"1910.01104v3","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.01104","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"pith_short_12","alias_value":"G56RH5PSEKXB","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"pith_short_16","alias_value":"G56RH5PSEKXBIKL2","created_at":"2026-07-05T06:11:52Z"},{"alias_kind":"pith_short_8","alias_value":"G56RH5PS","created_at":"2026-07-05T06:11:52Z"}],"graph_snapshots":[{"event_id":"sha256:4a2b5b2c1dd9dbb1685b1f2cee0e785d421e8071b66f1ac557c4ddfad53ed855","target":"graph","created_at":"2026-07-05T06:11:52Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1910.01104/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce $k$-evolution, a relativistic $N$-body code based on $\\textit{gevolution}$, which includes clustering dark energy among its cosmological components. To describe dark energy, we use the effective field theory approach. In particular, we focus on $k$-essence with a speed of sound much smaller than unity but we lay down the basis to extend the code to other dark energy and modified gravity models. We develop the formalism including dark energy non-linearities but, as a first step, we implement the equations in the code after dropping non-linear self-coupling in the $k$-essence field.","authors_text":"Farbod Hassani, Filippo Vernizzi, Julian Adamek, Martin Kunz","cross_cats":["gr-qc","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-02T17:54:16Z","title":"$k$-evolution: a relativistic N-body code for clustering dark energy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.01104","kind":"arxiv","version":3},"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":"sha256:9f2e64b1fcfff55f56a9504ee50c4eccf103d3238403b2d0704e44d6c1f0ffcb","target":"record","created_at":"2026-07-05T06:11:52Z","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":"52fc71513626ab6610f64430d338a4895f37da85860c6fb0f083bf3fef93254b","cross_cats_sorted":["gr-qc","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-02T17:54:16Z","title_canon_sha256":"8d6bbade10c9cac99c77b7c834c5a19e826a6f0c1cd8d5c5fa7e3f847edfb7e2"},"schema_version":"1.0","source":{"id":"1910.01104","kind":"arxiv","version":3}},"canonical_sha256":"377d13f5f222ae14297a346f14f0c6b7c34e4efb48fd47cc6d2671fe5f5f3204","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"377d13f5f222ae14297a346f14f0c6b7c34e4efb48fd47cc6d2671fe5f5f3204","first_computed_at":"2026-07-05T06:11:52.349117Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:11:52.349117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ka/TClczoqBV3KonCPbdON34EEeNX9hDw3T5gopMgEtcTH457VGfoSPdsMLSMdvQOqA0aRyHfLdbPpaO9n0VDg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:11:52.349608Z","signed_message":"canonical_sha256_bytes"},"source_id":"1910.01104","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f2e64b1fcfff55f56a9504ee50c4eccf103d3238403b2d0704e44d6c1f0ffcb","sha256:4a2b5b2c1dd9dbb1685b1f2cee0e785d421e8071b66f1ac557c4ddfad53ed855"],"state_sha256":"db434fc2d59818fd830bddb2e5760913b7059baf01c18ed9aab954fe1bd103cb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3LfczOBV58m3Tx1XKPuqwEA6ruCFNJY8LKzUE0t/B9uY9IQBNwNqNpIwQnSct1+Vpd6K0UEvprtr2I35eKZaCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T18:05:59.651549Z","bundle_sha256":"8112049e692b689c0b536e74d36f158ab36e6fe2954433c0590121ce7ac71b23"}}