{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ICZEKB53WYPKHYBITTNYU25DDB","short_pith_number":"pith:ICZEKB53","canonical_record":{"source":{"id":"1902.02585","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-02-07T12:31:01Z","cross_cats_sorted":[],"title_canon_sha256":"42e0846b72356b12f8243efb1d67eff6eedae921018cae605e8637c25ece5d1a","abstract_canon_sha256":"ed7cb152f0511291108c52d0d26ad5f135da07c5d227dbf3bfead8e2c3835e26"},"schema_version":"1.0"},"canonical_sha256":"40b24507bbb61ea3e0289cdb8a6ba3185e73e648a6e118feb05bfc44d31aea87","source":{"kind":"arxiv","id":"1902.02585","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02585","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02585v1","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02585","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"ICZEKB53WYPK","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"ICZEKB53WYPKHYBI","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"ICZEKB53","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ICZEKB53WYPKHYBITTNYU25DDB","target":"record","payload":{"canonical_record":{"source":{"id":"1902.02585","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-02-07T12:31:01Z","cross_cats_sorted":[],"title_canon_sha256":"42e0846b72356b12f8243efb1d67eff6eedae921018cae605e8637c25ece5d1a","abstract_canon_sha256":"ed7cb152f0511291108c52d0d26ad5f135da07c5d227dbf3bfead8e2c3835e26"},"schema_version":"1.0"},"canonical_sha256":"40b24507bbb61ea3e0289cdb8a6ba3185e73e648a6e118feb05bfc44d31aea87","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:21.423127Z","signature_b64":"j6oTQiVzEtLzdjWTZsJ/DS74Pl/0cEEfrBUFK5rLsjkxQnWwLMELqkPs30jgoRcoobN0kZVKA3paxJXeaHFdDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"40b24507bbb61ea3e0289cdb8a6ba3185e73e648a6e118feb05bfc44d31aea87","last_reissued_at":"2026-05-17T23:50:21.422634Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:21.422634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.02585","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":"2026-05-17T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Op2r3j5f8j0nO12td2YFnbeu8G26hGMja2227uTz4DhxxTZ2Ak2qDQZiP0RBArPeZkp7ZkVU1T41PFPxkXn4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T09:39:38.114752Z"},"content_sha256":"930cbd3d9aa07c56817f35aaf4d7287ed0e4747e6c101b22ebc1a60452e1fb37","schema_version":"1.0","event_id":"sha256:930cbd3d9aa07c56817f35aaf4d7287ed0e4747e6c101b22ebc1a60452e1fb37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ICZEKB53WYPKHYBITTNYU25DDB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Non-smooth gravity and parity violation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Iber\\^e Kuntz","submitted_at":"2019-02-07T12:31:01Z","abstract_excerpt":"A conservative extension of general relativity is proposed by alleviating the differentiability of the metric and allowing for non-smooth solutions. We show that these metrics break some symmetries of the Riemann tensor, yielding a new scalar curvature invariant besides the usual Ricci scalar. To first order in the curvature, this adds a new piece of information to the action, containing interesting and unexplored physics. The spectrum of the theory reveals the presence of an additional massless spin-1 field apart from the massless spin-2 graviton. We argue that this new contribution violates "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02585","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":"2026-05-17T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gxOENWUiSq/yZz/ZKUXFBphW+xcbAkiduP0JUzLFbBq+k9qj6JIv8a0NS0bvS5lXK9W0n5cJTDAwgntLdnwbBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T09:39:38.115365Z"},"content_sha256":"1dbe461de5c0b8cf872ce7ab3a75f90118af5009e0b196204ea19155475a7271","schema_version":"1.0","event_id":"sha256:1dbe461de5c0b8cf872ce7ab3a75f90118af5009e0b196204ea19155475a7271"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ICZEKB53WYPKHYBITTNYU25DDB/bundle.json","state_url":"https://pith.science/pith/ICZEKB53WYPKHYBITTNYU25DDB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ICZEKB53WYPKHYBITTNYU25DDB/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":"2026-05-31T09:39:38Z","links":{"resolver":"https://pith.science/pith/ICZEKB53WYPKHYBITTNYU25DDB","bundle":"https://pith.science/pith/ICZEKB53WYPKHYBITTNYU25DDB/bundle.json","state":"https://pith.science/pith/ICZEKB53WYPKHYBITTNYU25DDB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ICZEKB53WYPKHYBITTNYU25DDB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ICZEKB53WYPKHYBITTNYU25DDB","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":"ed7cb152f0511291108c52d0d26ad5f135da07c5d227dbf3bfead8e2c3835e26","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-02-07T12:31:01Z","title_canon_sha256":"42e0846b72356b12f8243efb1d67eff6eedae921018cae605e8637c25ece5d1a"},"schema_version":"1.0","source":{"id":"1902.02585","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02585","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02585v1","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02585","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"ICZEKB53WYPK","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"ICZEKB53WYPKHYBI","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"ICZEKB53","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:1dbe461de5c0b8cf872ce7ab3a75f90118af5009e0b196204ea19155475a7271","target":"graph","created_at":"2026-05-17T23:50:21Z","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 conservative extension of general relativity is proposed by alleviating the differentiability of the metric and allowing for non-smooth solutions. We show that these metrics break some symmetries of the Riemann tensor, yielding a new scalar curvature invariant besides the usual Ricci scalar. To first order in the curvature, this adds a new piece of information to the action, containing interesting and unexplored physics. The spectrum of the theory reveals the presence of an additional massless spin-1 field apart from the massless spin-2 graviton. We argue that this new contribution violates ","authors_text":"Iber\\^e Kuntz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-02-07T12:31:01Z","title":"Non-smooth gravity and parity violation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02585","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":"sha256:930cbd3d9aa07c56817f35aaf4d7287ed0e4747e6c101b22ebc1a60452e1fb37","target":"record","created_at":"2026-05-17T23:50:21Z","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":"ed7cb152f0511291108c52d0d26ad5f135da07c5d227dbf3bfead8e2c3835e26","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-02-07T12:31:01Z","title_canon_sha256":"42e0846b72356b12f8243efb1d67eff6eedae921018cae605e8637c25ece5d1a"},"schema_version":"1.0","source":{"id":"1902.02585","kind":"arxiv","version":1}},"canonical_sha256":"40b24507bbb61ea3e0289cdb8a6ba3185e73e648a6e118feb05bfc44d31aea87","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40b24507bbb61ea3e0289cdb8a6ba3185e73e648a6e118feb05bfc44d31aea87","first_computed_at":"2026-05-17T23:50:21.422634Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:21.422634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j6oTQiVzEtLzdjWTZsJ/DS74Pl/0cEEfrBUFK5rLsjkxQnWwLMELqkPs30jgoRcoobN0kZVKA3paxJXeaHFdDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:21.423127Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.02585","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:930cbd3d9aa07c56817f35aaf4d7287ed0e4747e6c101b22ebc1a60452e1fb37","sha256:1dbe461de5c0b8cf872ce7ab3a75f90118af5009e0b196204ea19155475a7271"],"state_sha256":"5899867f99701e77ac460d50b51940ada81a273c6628d9a79e0c5231564a6780"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gxBUf6IaST3/g6zHYwU9oIyeeSdLGi/1uPPaL+Sd0kINm1UJQ2YyUOAY+BXW6bGADwQ8I2tzB0uPdnwKt3gVBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T09:39:38.120062Z","bundle_sha256":"d819198752d3f0f80188c18659f65142878701ded1a44fbdbc52c61ccc25f41a"}}