{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SIZDM65GLHMFLNPPCHFZ4FIWP2","short_pith_number":"pith:SIZDM65G","canonical_record":{"source":{"id":"1705.02843","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2017-05-08T12:11:36Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"480f91071e38a0ef376e23db069fd609aefdb5098808dad023c5be8b6e683c38","abstract_canon_sha256":"9e06693510cb4b49a3436f8c6ba6dd94d38fa5fdb21a575b29f36894bc7c3d2b"},"schema_version":"1.0"},"canonical_sha256":"9232367ba659d855b5ef11cb9e15167ea5a8898f89a107c2bc3b4a7327a07c29","source":{"kind":"arxiv","id":"1705.02843","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.02843","created_at":"2026-05-18T00:44:53Z"},{"alias_kind":"arxiv_version","alias_value":"1705.02843v1","created_at":"2026-05-18T00:44:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.02843","created_at":"2026-05-18T00:44:53Z"},{"alias_kind":"pith_short_12","alias_value":"SIZDM65GLHMF","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SIZDM65GLHMFLNPP","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SIZDM65G","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SIZDM65GLHMFLNPPCHFZ4FIWP2","target":"record","payload":{"canonical_record":{"source":{"id":"1705.02843","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2017-05-08T12:11:36Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"480f91071e38a0ef376e23db069fd609aefdb5098808dad023c5be8b6e683c38","abstract_canon_sha256":"9e06693510cb4b49a3436f8c6ba6dd94d38fa5fdb21a575b29f36894bc7c3d2b"},"schema_version":"1.0"},"canonical_sha256":"9232367ba659d855b5ef11cb9e15167ea5a8898f89a107c2bc3b4a7327a07c29","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:44:53.545441Z","signature_b64":"ZERTWXmPrCtpCVI64sBNBqQ3/DjT7EjQGuwQ5MFh/wrkqWD1012kYt3LaciGN4c3dlSHY7GkScSI8loWbdJ2BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9232367ba659d855b5ef11cb9e15167ea5a8898f89a107c2bc3b4a7327a07c29","last_reissued_at":"2026-05-18T00:44:53.544725Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:44:53.544725Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.02843","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":"2026-05-18T00:44:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1eFcrQoB57rlzWy5ZOlaldrxeSgRWXugTIWHyEz2XapzKweQSZ9Abb/OUP/6Ohg3EDxPUaeaN3Nk3VD1wVEuBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T14:25:30.461392Z"},"content_sha256":"90600555c2bd67b6be956c6e5451c97305439a9f311bb1218894faf3625501a3","schema_version":"1.0","event_id":"sha256:90600555c2bd67b6be956c6e5451c97305439a9f311bb1218894faf3625501a3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SIZDM65GLHMFLNPPCHFZ4FIWP2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Block-Parallel IDA* for GPUs (Extended Manuscript)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.DC"],"primary_cat":"cs.AI","authors_text":"Alex Fukunaga, Satoru Horie","submitted_at":"2017-05-08T12:11:36Z","abstract_excerpt":"We investigate GPU-based parallelization of Iterative-Deepening A* (IDA*). We show that straightforward thread-based parallelization techniques which were previously proposed for massively parallel SIMD processors perform poorly due to warp divergence and load imbalance. We propose Block-Parallel IDA* (BPIDA*), which assigns the search of a subtree to a block (a group of threads with access to fast shared memory) rather than a thread. On the 15-puzzle, BPIDA* on a NVIDIA GRID K520 with 1536 CUDA cores achieves a speedup of 4.98 compared to a highly optimized sequential IDA* implementation on a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.02843","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":""},"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":"2026-05-18T00:44:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7yKDjY462d+PlYZu4QNcvWERZuHTFbCSeKz1VjDfccUdN6H+fQN4b8Onk2+bi7CKKj9vIzgRhAnktjzmvamvDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T14:25:30.461741Z"},"content_sha256":"33b8a369f870909918fd7807a8ceb48240d3042c76bf525123f0f010df3b3d75","schema_version":"1.0","event_id":"sha256:33b8a369f870909918fd7807a8ceb48240d3042c76bf525123f0f010df3b3d75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SIZDM65GLHMFLNPPCHFZ4FIWP2/bundle.json","state_url":"https://pith.science/pith/SIZDM65GLHMFLNPPCHFZ4FIWP2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SIZDM65GLHMFLNPPCHFZ4FIWP2/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":"2026-06-26T14:25:30Z","links":{"resolver":"https://pith.science/pith/SIZDM65GLHMFLNPPCHFZ4FIWP2","bundle":"https://pith.science/pith/SIZDM65GLHMFLNPPCHFZ4FIWP2/bundle.json","state":"https://pith.science/pith/SIZDM65GLHMFLNPPCHFZ4FIWP2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SIZDM65GLHMFLNPPCHFZ4FIWP2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SIZDM65GLHMFLNPPCHFZ4FIWP2","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":"9e06693510cb4b49a3436f8c6ba6dd94d38fa5fdb21a575b29f36894bc7c3d2b","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2017-05-08T12:11:36Z","title_canon_sha256":"480f91071e38a0ef376e23db069fd609aefdb5098808dad023c5be8b6e683c38"},"schema_version":"1.0","source":{"id":"1705.02843","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.02843","created_at":"2026-05-18T00:44:53Z"},{"alias_kind":"arxiv_version","alias_value":"1705.02843v1","created_at":"2026-05-18T00:44:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.02843","created_at":"2026-05-18T00:44:53Z"},{"alias_kind":"pith_short_12","alias_value":"SIZDM65GLHMF","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SIZDM65GLHMFLNPP","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SIZDM65G","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:33b8a369f870909918fd7807a8ceb48240d3042c76bf525123f0f010df3b3d75","target":"graph","created_at":"2026-05-18T00:44:53Z","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 investigate GPU-based parallelization of Iterative-Deepening A* (IDA*). We show that straightforward thread-based parallelization techniques which were previously proposed for massively parallel SIMD processors perform poorly due to warp divergence and load imbalance. We propose Block-Parallel IDA* (BPIDA*), which assigns the search of a subtree to a block (a group of threads with access to fast shared memory) rather than a thread. On the 15-puzzle, BPIDA* on a NVIDIA GRID K520 with 1536 CUDA cores achieves a speedup of 4.98 compared to a highly optimized sequential IDA* implementation on a","authors_text":"Alex Fukunaga, Satoru Horie","cross_cats":["cs.DC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2017-05-08T12:11:36Z","title":"Block-Parallel IDA* for GPUs (Extended Manuscript)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.02843","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":"sha256:90600555c2bd67b6be956c6e5451c97305439a9f311bb1218894faf3625501a3","target":"record","created_at":"2026-05-18T00:44:53Z","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":"9e06693510cb4b49a3436f8c6ba6dd94d38fa5fdb21a575b29f36894bc7c3d2b","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2017-05-08T12:11:36Z","title_canon_sha256":"480f91071e38a0ef376e23db069fd609aefdb5098808dad023c5be8b6e683c38"},"schema_version":"1.0","source":{"id":"1705.02843","kind":"arxiv","version":1}},"canonical_sha256":"9232367ba659d855b5ef11cb9e15167ea5a8898f89a107c2bc3b4a7327a07c29","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9232367ba659d855b5ef11cb9e15167ea5a8898f89a107c2bc3b4a7327a07c29","first_computed_at":"2026-05-18T00:44:53.544725Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:44:53.544725Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZERTWXmPrCtpCVI64sBNBqQ3/DjT7EjQGuwQ5MFh/wrkqWD1012kYt3LaciGN4c3dlSHY7GkScSI8loWbdJ2BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:44:53.545441Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.02843","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:90600555c2bd67b6be956c6e5451c97305439a9f311bb1218894faf3625501a3","sha256:33b8a369f870909918fd7807a8ceb48240d3042c76bf525123f0f010df3b3d75"],"state_sha256":"c762beebb3a4a72e4b749b8a1a14a0a1d38ba9bd07696bbfd398179d3379897b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o1ytrCF2+8Qglv7owFnm3I4PkMhBzbx8qFoqQsBvyG23S8A+SA8ce6pgKUedFiOjdOFRaoc9LoCZ/RzixFrOBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T14:25:30.463757Z","bundle_sha256":"e91545c1804ebf367bd4d0a7d9d84da65cbe58606d7ca74faad35b0ffba38f79"}}