{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:ADQRRSUZ6BN7CL7JU6UPQCLOLR","short_pith_number":"pith:ADQRRSUZ","canonical_record":{"source":{"id":"2607.21677","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-23T11:02:24Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"f50c7b7f3dfc5f1e51af16e94f8a0d94d48af312a75710678ff2adf6b3893dca","abstract_canon_sha256":"708e4af7f6aac1de07324fc81f4ceb39eb5e86f8441b22003ed6d5623811f22e"},"schema_version":"1.0"},"canonical_sha256":"00e118ca99f05bf12fe9a7a8f8096e5c4ebdc449a814ef431f56b12090ee07db","source":{"kind":"arxiv","id":"2607.21677","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21677","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21677v1","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21677","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"pith_short_12","alias_value":"ADQRRSUZ6BN7","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"pith_short_16","alias_value":"ADQRRSUZ6BN7CL7J","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"pith_short_8","alias_value":"ADQRRSUZ","created_at":"2026-07-27T00:20:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:ADQRRSUZ6BN7CL7JU6UPQCLOLR","target":"record","payload":{"canonical_record":{"source":{"id":"2607.21677","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-23T11:02:24Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"f50c7b7f3dfc5f1e51af16e94f8a0d94d48af312a75710678ff2adf6b3893dca","abstract_canon_sha256":"708e4af7f6aac1de07324fc81f4ceb39eb5e86f8441b22003ed6d5623811f22e"},"schema_version":"1.0"},"canonical_sha256":"00e118ca99f05bf12fe9a7a8f8096e5c4ebdc449a814ef431f56b12090ee07db","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-27T00:20:14.571456Z","signature_b64":"JuzS1xPkYRbNToc3ixa0FGEmIjWxhD2LZ2JI4mENkoERdLpvnOAo89ZBV6sktJ1eKHAEdwjTWEgBwcjsv/T9Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"00e118ca99f05bf12fe9a7a8f8096e5c4ebdc449a814ef431f56b12090ee07db","last_reissued_at":"2026-07-27T00:20:14.570583Z","signature_status":"signed_v1","first_computed_at":"2026-07-27T00:20:14.570583Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.21677","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":"2026-07-27T00:20:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R5wM6/c/sJIx1Eazwy1EczUueeeNSdidUgWiokAYWvuzrgpSEreUE//oVYpwj2FkeMtLNnmXU/H5VmkWQXDuBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T20:04:04.581233Z"},"content_sha256":"9f4ed3f00b45b2f67851d94db91c217137d6352a1f71c73bb1db498b8c6e770f","schema_version":"1.0","event_id":"sha256:9f4ed3f00b45b2f67851d94db91c217137d6352a1f71c73bb1db498b8c6e770f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:ADQRRSUZ6BN7CL7JU6UPQCLOLR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhancing SLMs for Sustainable Code Optimization in Radio-Astronomy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.SE","authors_text":"Elisa Chiarotto, Jingbo Li, P. Chris Broekema, Rob V. van Nieuwpoort","submitted_at":"2026-07-23T11:02:24Z","abstract_excerpt":"Recent Large Language Models (LLMs) can produce and optimize complex code. We investigate the use of LLMs to generate and optimize code for large-scale sciences, focusing on radio astronomy and sustainability. The LOFAR telescope is currently being upgraded, significantly increasing the sky area observed, while simultaneously processing more data faster. However, this is expected to increase the computational requirements 40-fold. This upgrade thus critically depends on rigorous performance optimization of existing software and widespread adoption of accelerators. The code base is very large, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21677","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/2607.21677/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":"2026-07-27T00:20:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ZRq78w7yrFN/r9ggUbG9ME4ZwD7KH4YpdRhl3Yjo43F7W/O7ylXp0iZJnsZLF7AfiSfWN5DpPW8w1UtPLzlAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T20:04:04.581514Z"},"content_sha256":"3c0aadc1ed501151f90c63c048027830e3f3126aec6ad4cb529623fe6db3b837","schema_version":"1.0","event_id":"sha256:3c0aadc1ed501151f90c63c048027830e3f3126aec6ad4cb529623fe6db3b837"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ADQRRSUZ6BN7CL7JU6UPQCLOLR/bundle.json","state_url":"https://pith.science/pith/ADQRRSUZ6BN7CL7JU6UPQCLOLR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ADQRRSUZ6BN7CL7JU6UPQCLOLR/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":"2026-07-31T20:04:04Z","links":{"resolver":"https://pith.science/pith/ADQRRSUZ6BN7CL7JU6UPQCLOLR","bundle":"https://pith.science/pith/ADQRRSUZ6BN7CL7JU6UPQCLOLR/bundle.json","state":"https://pith.science/pith/ADQRRSUZ6BN7CL7JU6UPQCLOLR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ADQRRSUZ6BN7CL7JU6UPQCLOLR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:ADQRRSUZ6BN7CL7JU6UPQCLOLR","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":"708e4af7f6aac1de07324fc81f4ceb39eb5e86f8441b22003ed6d5623811f22e","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-23T11:02:24Z","title_canon_sha256":"f50c7b7f3dfc5f1e51af16e94f8a0d94d48af312a75710678ff2adf6b3893dca"},"schema_version":"1.0","source":{"id":"2607.21677","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21677","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21677v1","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21677","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"pith_short_12","alias_value":"ADQRRSUZ6BN7","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"pith_short_16","alias_value":"ADQRRSUZ6BN7CL7J","created_at":"2026-07-27T00:20:14Z"},{"alias_kind":"pith_short_8","alias_value":"ADQRRSUZ","created_at":"2026-07-27T00:20:14Z"}],"graph_snapshots":[{"event_id":"sha256:3c0aadc1ed501151f90c63c048027830e3f3126aec6ad4cb529623fe6db3b837","target":"graph","created_at":"2026-07-27T00:20:14Z","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/2607.21677/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent Large Language Models (LLMs) can produce and optimize complex code. We investigate the use of LLMs to generate and optimize code for large-scale sciences, focusing on radio astronomy and sustainability. The LOFAR telescope is currently being upgraded, significantly increasing the sky area observed, while simultaneously processing more data faster. However, this is expected to increase the computational requirements 40-fold. This upgrade thus critically depends on rigorous performance optimization of existing software and widespread adoption of accelerators. The code base is very large, ","authors_text":"Elisa Chiarotto, Jingbo Li, P. Chris Broekema, Rob V. van Nieuwpoort","cross_cats":["cs.AI"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-23T11:02:24Z","title":"Enhancing SLMs for Sustainable Code Optimization in Radio-Astronomy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21677","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":"sha256:9f4ed3f00b45b2f67851d94db91c217137d6352a1f71c73bb1db498b8c6e770f","target":"record","created_at":"2026-07-27T00:20:14Z","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":"708e4af7f6aac1de07324fc81f4ceb39eb5e86f8441b22003ed6d5623811f22e","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-23T11:02:24Z","title_canon_sha256":"f50c7b7f3dfc5f1e51af16e94f8a0d94d48af312a75710678ff2adf6b3893dca"},"schema_version":"1.0","source":{"id":"2607.21677","kind":"arxiv","version":1}},"canonical_sha256":"00e118ca99f05bf12fe9a7a8f8096e5c4ebdc449a814ef431f56b12090ee07db","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00e118ca99f05bf12fe9a7a8f8096e5c4ebdc449a814ef431f56b12090ee07db","first_computed_at":"2026-07-27T00:20:14.570583Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-27T00:20:14.570583Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JuzS1xPkYRbNToc3ixa0FGEmIjWxhD2LZ2JI4mENkoERdLpvnOAo89ZBV6sktJ1eKHAEdwjTWEgBwcjsv/T9Bw==","signature_status":"signed_v1","signed_at":"2026-07-27T00:20:14.571456Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.21677","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f4ed3f00b45b2f67851d94db91c217137d6352a1f71c73bb1db498b8c6e770f","sha256:3c0aadc1ed501151f90c63c048027830e3f3126aec6ad4cb529623fe6db3b837"],"state_sha256":"a54a54a6ac825fee1cfa905fa0c7bde58d282f63e54002c8144d5c91419e770c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UQrew+RD0n8FrAw5YmBfA+YDJEiwB99cpvdySIea52wwtl4rcW5Ge0ubT5RPMTn5bmhTDTRUgZz287w4DkxsCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T20:04:04.583758Z","bundle_sha256":"96d20d4aeb278bce050ccb3443252ebd25d51a5a5c6285dc6db3868b2a0f04bb"}}