{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:MJXVT7Q62W3MUAZYUJRJ72SJX6","short_pith_number":"pith:MJXVT7Q6","canonical_record":{"source":{"id":"1501.04706","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CG","submitted_at":"2015-01-20T03:23:29Z","cross_cats_sorted":["cs.GR"],"title_canon_sha256":"14f3814e6c82a0f218736aae18ac78178b80e6326b387ed7a436b04e31861536","abstract_canon_sha256":"1c015dae56f9dd00097ddca374d78a973aeb95803ac13f4d4ffae81d43f71f0e"},"schema_version":"1.0"},"canonical_sha256":"626f59fe1ed5b6ca0338a2629fea49bfab34d53765e8777b534bf728b5b74108","source":{"kind":"arxiv","id":"1501.04706","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.04706","created_at":"2026-05-18T00:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"1501.04706v3","created_at":"2026-05-18T00:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.04706","created_at":"2026-05-18T00:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"MJXVT7Q62W3M","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MJXVT7Q62W3MUAZY","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MJXVT7Q6","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:MJXVT7Q62W3MUAZYUJRJ72SJX6","target":"record","payload":{"canonical_record":{"source":{"id":"1501.04706","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CG","submitted_at":"2015-01-20T03:23:29Z","cross_cats_sorted":["cs.GR"],"title_canon_sha256":"14f3814e6c82a0f218736aae18ac78178b80e6326b387ed7a436b04e31861536","abstract_canon_sha256":"1c015dae56f9dd00097ddca374d78a973aeb95803ac13f4d4ffae81d43f71f0e"},"schema_version":"1.0"},"canonical_sha256":"626f59fe1ed5b6ca0338a2629fea49bfab34d53765e8777b534bf728b5b74108","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:42.990017Z","signature_b64":"ARfEo5zZVl3P4kAF+7J4Q1InEQIoZSnqq194ap5/Ok0WC2U3wVlGVqGp55xJTIujfFxw3h1plO46CIhXHV2CCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"626f59fe1ed5b6ca0338a2629fea49bfab34d53765e8777b534bf728b5b74108","last_reissued_at":"2026-05-18T00:15:42.989495Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:42.989495Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.04706","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8ej3lHJHY5AGXG3/yQ5B0eP1HAb0XJKpbOMFYwnvSPb3Xh4mYtb3MofAeIqKDYPbvols/LGMvoLNeOjcRLtQBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:44:59.284987Z"},"content_sha256":"d0ece7ceb379f99d8e4ca71eca8a61763cbca045c303c929772237b29af608b6","schema_version":"1.0","event_id":"sha256:d0ece7ceb379f99d8e4ca71eca8a61763cbca045c303c929772237b29af608b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:MJXVT7Q62W3MUAZYUJRJ72SJX6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Novel Implementation of QuickHull Algorithm on the GPU","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.GR"],"primary_cat":"cs.CG","authors_text":"Gang Mei, Jiayin Zhang, Kunyang Zhao, Nengxiong Xu","submitted_at":"2015-01-20T03:23:29Z","abstract_excerpt":"We present a novel GPU-accelerated implementation of the QuickHull algorihtm for calculating convex hulls of planar point sets. We also describe a practical solution to demonstrate how to efficiently implement a typical Divide-and-Conquer algorithm on the GPU. We highly utilize the parallel primitives provided by the library Thrust such as the parallel segmented scan for better efficiency and simplicity. To evaluate the performance of our implementation, we carry out four groups of experimental tests using two groups of point sets in two modes on the GPU K20c. Experimental results indicate tha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.04706","kind":"arxiv","version":3},"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":"2026-05-18T00:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"52TiJ+BF36/VX4w7n29dy+8fRtPE0bMFutpHPGMwlDTXl2mAZufibCHEvZrEQxXyTAxwDXbq7ViNXLwDcERBCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:44:59.285345Z"},"content_sha256":"591a681b2c514e800f20fc68daa3e3e1f361755f19ebcd7ffb3f9f42340afe63","schema_version":"1.0","event_id":"sha256:591a681b2c514e800f20fc68daa3e3e1f361755f19ebcd7ffb3f9f42340afe63"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MJXVT7Q62W3MUAZYUJRJ72SJX6/bundle.json","state_url":"https://pith.science/pith/MJXVT7Q62W3MUAZYUJRJ72SJX6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MJXVT7Q62W3MUAZYUJRJ72SJX6/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":"2026-06-02T22:44:59Z","links":{"resolver":"https://pith.science/pith/MJXVT7Q62W3MUAZYUJRJ72SJX6","bundle":"https://pith.science/pith/MJXVT7Q62W3MUAZYUJRJ72SJX6/bundle.json","state":"https://pith.science/pith/MJXVT7Q62W3MUAZYUJRJ72SJX6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MJXVT7Q62W3MUAZYUJRJ72SJX6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MJXVT7Q62W3MUAZYUJRJ72SJX6","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":"1c015dae56f9dd00097ddca374d78a973aeb95803ac13f4d4ffae81d43f71f0e","cross_cats_sorted":["cs.GR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CG","submitted_at":"2015-01-20T03:23:29Z","title_canon_sha256":"14f3814e6c82a0f218736aae18ac78178b80e6326b387ed7a436b04e31861536"},"schema_version":"1.0","source":{"id":"1501.04706","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.04706","created_at":"2026-05-18T00:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"1501.04706v3","created_at":"2026-05-18T00:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.04706","created_at":"2026-05-18T00:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"MJXVT7Q62W3M","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MJXVT7Q62W3MUAZY","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MJXVT7Q6","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:591a681b2c514e800f20fc68daa3e3e1f361755f19ebcd7ffb3f9f42340afe63","target":"graph","created_at":"2026-05-18T00:15:42Z","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 a novel GPU-accelerated implementation of the QuickHull algorihtm for calculating convex hulls of planar point sets. We also describe a practical solution to demonstrate how to efficiently implement a typical Divide-and-Conquer algorithm on the GPU. We highly utilize the parallel primitives provided by the library Thrust such as the parallel segmented scan for better efficiency and simplicity. To evaluate the performance of our implementation, we carry out four groups of experimental tests using two groups of point sets in two modes on the GPU K20c. Experimental results indicate tha","authors_text":"Gang Mei, Jiayin Zhang, Kunyang Zhao, Nengxiong Xu","cross_cats":["cs.GR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CG","submitted_at":"2015-01-20T03:23:29Z","title":"A Novel Implementation of QuickHull Algorithm on the GPU"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.04706","kind":"arxiv","version":3},"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:d0ece7ceb379f99d8e4ca71eca8a61763cbca045c303c929772237b29af608b6","target":"record","created_at":"2026-05-18T00:15:42Z","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":"1c015dae56f9dd00097ddca374d78a973aeb95803ac13f4d4ffae81d43f71f0e","cross_cats_sorted":["cs.GR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CG","submitted_at":"2015-01-20T03:23:29Z","title_canon_sha256":"14f3814e6c82a0f218736aae18ac78178b80e6326b387ed7a436b04e31861536"},"schema_version":"1.0","source":{"id":"1501.04706","kind":"arxiv","version":3}},"canonical_sha256":"626f59fe1ed5b6ca0338a2629fea49bfab34d53765e8777b534bf728b5b74108","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"626f59fe1ed5b6ca0338a2629fea49bfab34d53765e8777b534bf728b5b74108","first_computed_at":"2026-05-18T00:15:42.989495Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:42.989495Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ARfEo5zZVl3P4kAF+7J4Q1InEQIoZSnqq194ap5/Ok0WC2U3wVlGVqGp55xJTIujfFxw3h1plO46CIhXHV2CCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:42.990017Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.04706","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d0ece7ceb379f99d8e4ca71eca8a61763cbca045c303c929772237b29af608b6","sha256:591a681b2c514e800f20fc68daa3e3e1f361755f19ebcd7ffb3f9f42340afe63"],"state_sha256":"ae0057bb78651a0fa64543f442d4a0ceb0d0860438dc9844c055269196fa200d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5n8AhP5Zq5VKBPG1tM7eZdujwbskVV2Udt943mQVleTZ1h9oDvOj+mnvXoL02BKOvUrjhKniaVDymzTjsjTJCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T22:44:59.287290Z","bundle_sha256":"3148ef80d395fc4879706abb85f1e006d0e7eee93aa1ee1e45f0fb9c98f5a8a1"}}