{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:2OAJNXEV4PUPDCMT7ROY7H3M7D","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":"3f2eac0dbf701ce39f1a8ecf9abb314d9336f56bce83cdf2c8841c62d597b9f5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2017-11-22T10:48:44Z","title_canon_sha256":"8339c0b470f6c4d31518074ed10eabaefdaf1fb32a2320a0668e29196b4ff87b"},"schema_version":"1.0","source":{"id":"1711.08221","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.08221","created_at":"2026-05-17T23:44:15Z"},{"alias_kind":"arxiv_version","alias_value":"1711.08221v2","created_at":"2026-05-17T23:44:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.08221","created_at":"2026-05-17T23:44:15Z"},{"alias_kind":"pith_short_12","alias_value":"2OAJNXEV4PUP","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2OAJNXEV4PUPDCMT","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2OAJNXEV","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:e76a591ee6c462f4691afbe5dcd07a558e129d90ce3167b44f0dd03394b289e3","target":"graph","created_at":"2026-05-17T23:44:15Z","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"},"paper":{"abstract_excerpt":"We present the first results on the construction of an exascale hyperbolic PDE engine (ExaHyPE), a code for the next generation of supercomputers with the objective to evolve dynamical spacetimes of black holes, neutron stars and binaries. We solve a novel first order formulation of Einstein field equations in the conformal and constraint damping Z4 formulation (CCZ4) coupled to ideal general relativistic magnetohydrodynamics (GRMHD), using divergence-cleaning. We adopt a novel communication-avoiding one-step ADER-DG scheme with an a-posteriori subcell finite volume limiter on adaptive spacetr","authors_text":"Sven K\\\"oppel","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2017-11-22T10:48:44Z","title":"Towards an exascale code for GRMHD on dynamical spacetimes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.08221","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:d4346c862e742bb4b244744f22bd1433338d43c746a893847612eef9fb178c52","target":"record","created_at":"2026-05-17T23:44:15Z","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":"3f2eac0dbf701ce39f1a8ecf9abb314d9336f56bce83cdf2c8841c62d597b9f5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2017-11-22T10:48:44Z","title_canon_sha256":"8339c0b470f6c4d31518074ed10eabaefdaf1fb32a2320a0668e29196b4ff87b"},"schema_version":"1.0","source":{"id":"1711.08221","kind":"arxiv","version":2}},"canonical_sha256":"d38096dc95e3e8f18993fc5d8f9f6cf8e842783a19fb6ed459ed61657707499d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d38096dc95e3e8f18993fc5d8f9f6cf8e842783a19fb6ed459ed61657707499d","first_computed_at":"2026-05-17T23:44:15.638273Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:15.638273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j+Vbj2U7Kypdk/r2JJhdnwsdn33y1tuFsFFCZP3EpwgF9kYg267mY8EM/wDOXQbzx3WCkxeG9nnXq+LX5tmcBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:15.638695Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.08221","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4346c862e742bb4b244744f22bd1433338d43c746a893847612eef9fb178c52","sha256:e76a591ee6c462f4691afbe5dcd07a558e129d90ce3167b44f0dd03394b289e3"],"state_sha256":"9b752b4d082c89d121e17681e82f98c03d97a84899305f27812d9e932426b51a"}