{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:4V2HHOOODZ325PSCCFWBT63ZHJ","short_pith_number":"pith:4V2HHOOO","canonical_record":{"source":{"id":"2505.15535","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.NA","submitted_at":"2025-05-21T13:56:16Z","cross_cats_sorted":["cs.NA"],"title_canon_sha256":"42fce3cacf5ff6a3565ec7490bc4eb45926b9df6d2d82dd927899b661bf551b2","abstract_canon_sha256":"1c55c29e71c4b100c0251ebec2d72b9f69eee5f8c92c38c9371d622cf386bc49"},"schema_version":"1.0"},"canonical_sha256":"e57473b9ce1e77aebe42116c19fb793a50545b3fae5377f65108098ae518a0f1","source":{"kind":"arxiv","id":"2505.15535","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.15535","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"arxiv_version","alias_value":"2505.15535v1","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.15535","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"pith_short_12","alias_value":"4V2HHOOODZ32","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"pith_short_16","alias_value":"4V2HHOOODZ325PSC","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"pith_short_8","alias_value":"4V2HHOOO","created_at":"2026-07-05T11:06:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:4V2HHOOODZ325PSCCFWBT63ZHJ","target":"record","payload":{"canonical_record":{"source":{"id":"2505.15535","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.NA","submitted_at":"2025-05-21T13:56:16Z","cross_cats_sorted":["cs.NA"],"title_canon_sha256":"42fce3cacf5ff6a3565ec7490bc4eb45926b9df6d2d82dd927899b661bf551b2","abstract_canon_sha256":"1c55c29e71c4b100c0251ebec2d72b9f69eee5f8c92c38c9371d622cf386bc49"},"schema_version":"1.0"},"canonical_sha256":"e57473b9ce1e77aebe42116c19fb793a50545b3fae5377f65108098ae518a0f1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:06:47.404282Z","signature_b64":"XZ3i3su9PoCPt5jmmU/Q3AMDFTPbuk53138S3Cz2sqVMQsS2vWEfFe+/YNnCiGUHSkkF8iZxS50MkaoaGy0uBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e57473b9ce1e77aebe42116c19fb793a50545b3fae5377f65108098ae518a0f1","last_reissued_at":"2026-07-05T11:06:47.403751Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:06:47.403751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.15535","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":"2026-07-05T11:06:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wmZCDI7NZlm0axDc+2RkDmBXnten8S44FUkaDTQl3qjcFjt9E9lD0xK3z1T7smVLimweAmuGLH9eUJVRrDpyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T03:20:12.122588Z"},"content_sha256":"10bf504b36a1c279a1dab404e2b768e034ad918c833514d2d55dd89a55fb1ed8","schema_version":"1.0","event_id":"sha256:10bf504b36a1c279a1dab404e2b768e034ad918c833514d2d55dd89a55fb1ed8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:4V2HHOOODZ325PSCCFWBT63ZHJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Matrix-Free Methods for Finite-Strain Elasticity: Automatic Code Generation with No Performance Overhead","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["cs.NA"],"primary_cat":"math.NA","authors_text":"Jo\\v{z}e Korelc, Martin Kronbichler, Micha{\\l} Wichrowski, Mohsen Rezaee-Hajidehi, Stanis{\\l}aw Stupkiewicz","submitted_at":"2025-05-21T13:56:16Z","abstract_excerpt":"This study explores matrix-free tangent evaluations in finite-strain elasticity with the use of automatically-generated code for the quadrature-point level calculations. The code generation is done via automatic differentiation (AD) with AceGen. We compare hand-written and AD-generated codes under two computing strategies: on-the-fly evaluation and caching intermediate results. The comparison reveals that the AD-generated code achieves superior performance in matrix-free computations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.15535","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/2505.15535/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":"2026-07-05T11:06:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H9kM9e4o1HxMu9f6qp2bxRv9dJGH0QOQU7Z8THd2ysKJ8vP/u7gZbHL5Oi+N5TeNtnxomu6kGkyee6WFI8QnBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T03:20:12.123078Z"},"content_sha256":"d7c501028db890d5ba30d845e2c4ee665c2fb9e550068c9fab8f930559d5c499","schema_version":"1.0","event_id":"sha256:d7c501028db890d5ba30d845e2c4ee665c2fb9e550068c9fab8f930559d5c499"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4V2HHOOODZ325PSCCFWBT63ZHJ/bundle.json","state_url":"https://pith.science/pith/4V2HHOOODZ325PSCCFWBT63ZHJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4V2HHOOODZ325PSCCFWBT63ZHJ/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":"2026-08-09T03:20:12Z","links":{"resolver":"https://pith.science/pith/4V2HHOOODZ325PSCCFWBT63ZHJ","bundle":"https://pith.science/pith/4V2HHOOODZ325PSCCFWBT63ZHJ/bundle.json","state":"https://pith.science/pith/4V2HHOOODZ325PSCCFWBT63ZHJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4V2HHOOODZ325PSCCFWBT63ZHJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:4V2HHOOODZ325PSCCFWBT63ZHJ","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":"1c55c29e71c4b100c0251ebec2d72b9f69eee5f8c92c38c9371d622cf386bc49","cross_cats_sorted":["cs.NA"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.NA","submitted_at":"2025-05-21T13:56:16Z","title_canon_sha256":"42fce3cacf5ff6a3565ec7490bc4eb45926b9df6d2d82dd927899b661bf551b2"},"schema_version":"1.0","source":{"id":"2505.15535","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.15535","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"arxiv_version","alias_value":"2505.15535v1","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.15535","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"pith_short_12","alias_value":"4V2HHOOODZ32","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"pith_short_16","alias_value":"4V2HHOOODZ325PSC","created_at":"2026-07-05T11:06:47Z"},{"alias_kind":"pith_short_8","alias_value":"4V2HHOOO","created_at":"2026-07-05T11:06:47Z"}],"graph_snapshots":[{"event_id":"sha256:d7c501028db890d5ba30d845e2c4ee665c2fb9e550068c9fab8f930559d5c499","target":"graph","created_at":"2026-07-05T11:06:47Z","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/2505.15535/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This study explores matrix-free tangent evaluations in finite-strain elasticity with the use of automatically-generated code for the quadrature-point level calculations. The code generation is done via automatic differentiation (AD) with AceGen. We compare hand-written and AD-generated codes under two computing strategies: on-the-fly evaluation and caching intermediate results. The comparison reveals that the AD-generated code achieves superior performance in matrix-free computations.","authors_text":"Jo\\v{z}e Korelc, Martin Kronbichler, Micha{\\l} Wichrowski, Mohsen Rezaee-Hajidehi, Stanis{\\l}aw Stupkiewicz","cross_cats":["cs.NA"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.NA","submitted_at":"2025-05-21T13:56:16Z","title":"Matrix-Free Methods for Finite-Strain Elasticity: Automatic Code Generation with No Performance Overhead"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.15535","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":"sha256:10bf504b36a1c279a1dab404e2b768e034ad918c833514d2d55dd89a55fb1ed8","target":"record","created_at":"2026-07-05T11:06:47Z","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":"1c55c29e71c4b100c0251ebec2d72b9f69eee5f8c92c38c9371d622cf386bc49","cross_cats_sorted":["cs.NA"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.NA","submitted_at":"2025-05-21T13:56:16Z","title_canon_sha256":"42fce3cacf5ff6a3565ec7490bc4eb45926b9df6d2d82dd927899b661bf551b2"},"schema_version":"1.0","source":{"id":"2505.15535","kind":"arxiv","version":1}},"canonical_sha256":"e57473b9ce1e77aebe42116c19fb793a50545b3fae5377f65108098ae518a0f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e57473b9ce1e77aebe42116c19fb793a50545b3fae5377f65108098ae518a0f1","first_computed_at":"2026-07-05T11:06:47.403751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:06:47.403751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XZ3i3su9PoCPt5jmmU/Q3AMDFTPbuk53138S3Cz2sqVMQsS2vWEfFe+/YNnCiGUHSkkF8iZxS50MkaoaGy0uBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:06:47.404282Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.15535","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:10bf504b36a1c279a1dab404e2b768e034ad918c833514d2d55dd89a55fb1ed8","sha256:d7c501028db890d5ba30d845e2c4ee665c2fb9e550068c9fab8f930559d5c499"],"state_sha256":"b6181ee831bfd40589768e2d051251956535c07459c3032d85da7b4cdea28c11"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gxZ9v2g3zZajePs0nk8gE5NfrgvH/l3Wfb9VadzfLRBfJHoQgwvI5FTljcL4xPFKA0z8Rf6DK8LK6S6z2dZHBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T03:20:12.127976Z","bundle_sha256":"3b703e4fde98d721fd5dd5da337aef78d7acba01416b510e2abce23799cad8bb"}}