{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:OBZDEKR4ZPVEFHH6O7JCIKQIQI","short_pith_number":"pith:OBZDEKR4","canonical_record":{"source":{"id":"1909.10415","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-23T15:13:58Z","cross_cats_sorted":[],"title_canon_sha256":"187d500f726785190c87465f7043d07b293a8eb1926a258f063649e436a4a78f","abstract_canon_sha256":"95dc2ed7fbd7dcfdb6a77265102a6aa9e5801bae11615314f69c20eb29abcb2d"},"schema_version":"1.0"},"canonical_sha256":"7072322a3ccbea429cfe77d2242a088231e45b0410e07d460a0e9b14c71afe90","source":{"kind":"arxiv","id":"1909.10415","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.10415","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"arxiv_version","alias_value":"1909.10415v1","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.10415","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"pith_short_12","alias_value":"OBZDEKR4ZPVE","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"pith_short_16","alias_value":"OBZDEKR4ZPVEFHH6","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"pith_short_8","alias_value":"OBZDEKR4","created_at":"2026-07-05T02:28:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:OBZDEKR4ZPVEFHH6O7JCIKQIQI","target":"record","payload":{"canonical_record":{"source":{"id":"1909.10415","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-23T15:13:58Z","cross_cats_sorted":[],"title_canon_sha256":"187d500f726785190c87465f7043d07b293a8eb1926a258f063649e436a4a78f","abstract_canon_sha256":"95dc2ed7fbd7dcfdb6a77265102a6aa9e5801bae11615314f69c20eb29abcb2d"},"schema_version":"1.0"},"canonical_sha256":"7072322a3ccbea429cfe77d2242a088231e45b0410e07d460a0e9b14c71afe90","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:28:15.569182Z","signature_b64":"ILmCuDHBOvh3Q6HEEZVvcWDIGLSkdmOu3vpF44P7ZmQhxTawvFBtVqVUwXS6MyEkpG8r5ksjJx/SyRktp7YmDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7072322a3ccbea429cfe77d2242a088231e45b0410e07d460a0e9b14c71afe90","last_reissued_at":"2026-07-05T02:28:15.568733Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:28:15.568733Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.10415","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":"2026-07-05T02:28:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fiLYuUWzYSrU0aIoE+z9MansYzBKjWV6/lGc3BhnQZD4p6EKK58FWYYGqubuZ/uBrriEDg8mOcFjoy8fFqzmDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T14:00:51.279679Z"},"content_sha256":"e3944b4445bb6469307276d9f2b8856ad57eaca31e5193e07a4d8aaad1b545f7","schema_version":"1.0","event_id":"sha256:e3944b4445bb6469307276d9f2b8856ad57eaca31e5193e07a4d8aaad1b545f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:OBZDEKR4ZPVEFHH6O7JCIKQIQI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An axiomatic purification of gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Luca Marzola, Manuel Hohmann, Tomi Koivisto","submitted_at":"2019-09-23T15:13:58Z","abstract_excerpt":"A theory of gravity is deduced from the axioms of the premetric program. The starting point is the conservation of energy and momenta, and the equivalence of gravitation and inertia. The latter is what leads to the framework of the so called purified gravity. The local and linear constitutive relation has 14 components when it is assumed to be metrical, but the compatibility of the constitutive relation with an action principle fixes uniquely the theory of Coincident General Relativity. The premetric formalism of purified gravity has a direct analogy with massive electromagnetism, the Planck m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.10415","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1909.10415/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":"2026-07-05T02:28:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"70/FSe/u4WVXSMeRqNQEsxcNq9kkozgZu71e0da0r7HL0dUl2Iwp1r9v3YKCH5ElStq+SXJANPSUXkyNUoi4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T14:00:51.280502Z"},"content_sha256":"bd7a46c0a1983dca34d0051e3c4eb63460e80f0c063c9308ff32b9b8e14a21c2","schema_version":"1.0","event_id":"sha256:bd7a46c0a1983dca34d0051e3c4eb63460e80f0c063c9308ff32b9b8e14a21c2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OBZDEKR4ZPVEFHH6O7JCIKQIQI/bundle.json","state_url":"https://pith.science/pith/OBZDEKR4ZPVEFHH6O7JCIKQIQI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OBZDEKR4ZPVEFHH6O7JCIKQIQI/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":"2026-08-09T14:00:51Z","links":{"resolver":"https://pith.science/pith/OBZDEKR4ZPVEFHH6O7JCIKQIQI","bundle":"https://pith.science/pith/OBZDEKR4ZPVEFHH6O7JCIKQIQI/bundle.json","state":"https://pith.science/pith/OBZDEKR4ZPVEFHH6O7JCIKQIQI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OBZDEKR4ZPVEFHH6O7JCIKQIQI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OBZDEKR4ZPVEFHH6O7JCIKQIQI","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":"95dc2ed7fbd7dcfdb6a77265102a6aa9e5801bae11615314f69c20eb29abcb2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-23T15:13:58Z","title_canon_sha256":"187d500f726785190c87465f7043d07b293a8eb1926a258f063649e436a4a78f"},"schema_version":"1.0","source":{"id":"1909.10415","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.10415","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"arxiv_version","alias_value":"1909.10415v1","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.10415","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"pith_short_12","alias_value":"OBZDEKR4ZPVE","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"pith_short_16","alias_value":"OBZDEKR4ZPVEFHH6","created_at":"2026-07-05T02:28:15Z"},{"alias_kind":"pith_short_8","alias_value":"OBZDEKR4","created_at":"2026-07-05T02:28:15Z"}],"graph_snapshots":[{"event_id":"sha256:bd7a46c0a1983dca34d0051e3c4eb63460e80f0c063c9308ff32b9b8e14a21c2","target":"graph","created_at":"2026-07-05T02:28:15Z","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/1909.10415/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A theory of gravity is deduced from the axioms of the premetric program. The starting point is the conservation of energy and momenta, and the equivalence of gravitation and inertia. The latter is what leads to the framework of the so called purified gravity. The local and linear constitutive relation has 14 components when it is assumed to be metrical, but the compatibility of the constitutive relation with an action principle fixes uniquely the theory of Coincident General Relativity. The premetric formalism of purified gravity has a direct analogy with massive electromagnetism, the Planck m","authors_text":"Luca Marzola, Manuel Hohmann, Tomi Koivisto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-23T15:13:58Z","title":"An axiomatic purification of gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.10415","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:e3944b4445bb6469307276d9f2b8856ad57eaca31e5193e07a4d8aaad1b545f7","target":"record","created_at":"2026-07-05T02:28:15Z","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":"95dc2ed7fbd7dcfdb6a77265102a6aa9e5801bae11615314f69c20eb29abcb2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-23T15:13:58Z","title_canon_sha256":"187d500f726785190c87465f7043d07b293a8eb1926a258f063649e436a4a78f"},"schema_version":"1.0","source":{"id":"1909.10415","kind":"arxiv","version":1}},"canonical_sha256":"7072322a3ccbea429cfe77d2242a088231e45b0410e07d460a0e9b14c71afe90","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7072322a3ccbea429cfe77d2242a088231e45b0410e07d460a0e9b14c71afe90","first_computed_at":"2026-07-05T02:28:15.568733Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:28:15.568733Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ILmCuDHBOvh3Q6HEEZVvcWDIGLSkdmOu3vpF44P7ZmQhxTawvFBtVqVUwXS6MyEkpG8r5ksjJx/SyRktp7YmDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:28:15.569182Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.10415","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3944b4445bb6469307276d9f2b8856ad57eaca31e5193e07a4d8aaad1b545f7","sha256:bd7a46c0a1983dca34d0051e3c4eb63460e80f0c063c9308ff32b9b8e14a21c2"],"state_sha256":"868a69628dcff75b1f8b45a8e54915cb289b9b2ff87dbcd0c812c850a90819d8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XBk2CblMBHBNR4Cptn3jcjEsyf3QHMFiRV4iO1cwbhdfaYLz6WhjFNqL76ehL9TGzf3EtDKDakXjJBrfsDf0Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T14:00:51.286484Z","bundle_sha256":"774d93e411e00a252c3ed71f4c4814d0b08538cef31d7af54c3ade369c12b075"}}