{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:7EGIFYDOGEC2KR5JDLEUEEDSIT","short_pith_number":"pith:7EGIFYDO","canonical_record":{"source":{"id":"1009.3819","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2010-09-20T13:53:39Z","cross_cats_sorted":[],"title_canon_sha256":"9042f56b2097381b69b4f2606e39ac7380980c1f8fcb47182631fbd158ab90ae","abstract_canon_sha256":"016c17d00d3624331b3c9614d26bd23d344bc5e2ff1bfe0343433a40c7e75199"},"schema_version":"1.0"},"canonical_sha256":"f90c82e06e3105a547a91ac942107244e70ebac6699d4dc9c3c5f66ce84384e8","source":{"kind":"arxiv","id":"1009.3819","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.3819","created_at":"2026-05-18T03:56:34Z"},{"alias_kind":"arxiv_version","alias_value":"1009.3819v1","created_at":"2026-05-18T03:56:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.3819","created_at":"2026-05-18T03:56:34Z"},{"alias_kind":"pith_short_12","alias_value":"7EGIFYDOGEC2","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"7EGIFYDOGEC2KR5J","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"7EGIFYDO","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:7EGIFYDOGEC2KR5JDLEUEEDSIT","target":"record","payload":{"canonical_record":{"source":{"id":"1009.3819","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2010-09-20T13:53:39Z","cross_cats_sorted":[],"title_canon_sha256":"9042f56b2097381b69b4f2606e39ac7380980c1f8fcb47182631fbd158ab90ae","abstract_canon_sha256":"016c17d00d3624331b3c9614d26bd23d344bc5e2ff1bfe0343433a40c7e75199"},"schema_version":"1.0"},"canonical_sha256":"f90c82e06e3105a547a91ac942107244e70ebac6699d4dc9c3c5f66ce84384e8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:56:34.211436Z","signature_b64":"eiNFCZJ4wjU9l9+fFA5xPXBrCoD+7O/36YirAE5ZnCU4/WWqKn4eQ2w4wZJq/CI0+cWlTch8Y+/kfkZAT4sXAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f90c82e06e3105a547a91ac942107244e70ebac6699d4dc9c3c5f66ce84384e8","last_reissued_at":"2026-05-18T03:56:34.210967Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:56:34.210967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1009.3819","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":"2026-05-18T03:56:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MZ6kaa2iBJjc/2qKTqHPg5KKfw2OLEjM9JXqTmGmrnkvY1zYsez2pwN0ndZaDF1zCWewreY+pHTQu+5bKkbpBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T19:16:34.448038Z"},"content_sha256":"93c5719a152caf62b952545438f77b4f0a1d4efd161c128e061ba7cf7a64c891","schema_version":"1.0","event_id":"sha256:93c5719a152caf62b952545438f77b4f0a1d4efd161c128e061ba7cf7a64c891"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:7EGIFYDOGEC2KR5JDLEUEEDSIT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fault Tolerant Variable Block Carry Skip Logic (VBCSL) using Parity Preserving Reversible Gates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AR","authors_text":"Md. Saiful Islam, Mohd. Zulfiquar Hafiz, Muhammad Mahbubur Rahman, Zerina Begum","submitted_at":"2010-09-20T13:53:39Z","abstract_excerpt":"Reversible logic design has become one of the promising research directions in low power dissipating circuit design in the past few years and has found its application in low power CMOS design, digital signal processing and nanotechnology. This paper presents the efficient design approaches of fault tolerant carry skip adders (FTCSAs) and compares those designs with the existing ones. Variable block carry skip logic (VBCSL) using the fault tolerant full adders (FTFAs) has also been developed. The designs are minimized in terms of hardware complexity, gate count, constant inputs and garbage out"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.3819","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":"2026-05-18T03:56:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gkxn935EcKBBEcwVB/s+vcpL+8Iho+Enf8BrATxyF1xPmUCg8D6V0kQbX6uv+CDrdO4Ma3cnhLrTyTLvc0kWDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T19:16:34.448695Z"},"content_sha256":"69639620ab2e57c8397ea361b65c634cece756cea078cc531207fa40cb5d062f","schema_version":"1.0","event_id":"sha256:69639620ab2e57c8397ea361b65c634cece756cea078cc531207fa40cb5d062f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7EGIFYDOGEC2KR5JDLEUEEDSIT/bundle.json","state_url":"https://pith.science/pith/7EGIFYDOGEC2KR5JDLEUEEDSIT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7EGIFYDOGEC2KR5JDLEUEEDSIT/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":"2026-06-05T19:16:34Z","links":{"resolver":"https://pith.science/pith/7EGIFYDOGEC2KR5JDLEUEEDSIT","bundle":"https://pith.science/pith/7EGIFYDOGEC2KR5JDLEUEEDSIT/bundle.json","state":"https://pith.science/pith/7EGIFYDOGEC2KR5JDLEUEEDSIT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7EGIFYDOGEC2KR5JDLEUEEDSIT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:7EGIFYDOGEC2KR5JDLEUEEDSIT","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":"016c17d00d3624331b3c9614d26bd23d344bc5e2ff1bfe0343433a40c7e75199","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2010-09-20T13:53:39Z","title_canon_sha256":"9042f56b2097381b69b4f2606e39ac7380980c1f8fcb47182631fbd158ab90ae"},"schema_version":"1.0","source":{"id":"1009.3819","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.3819","created_at":"2026-05-18T03:56:34Z"},{"alias_kind":"arxiv_version","alias_value":"1009.3819v1","created_at":"2026-05-18T03:56:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.3819","created_at":"2026-05-18T03:56:34Z"},{"alias_kind":"pith_short_12","alias_value":"7EGIFYDOGEC2","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"7EGIFYDOGEC2KR5J","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"7EGIFYDO","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:69639620ab2e57c8397ea361b65c634cece756cea078cc531207fa40cb5d062f","target":"graph","created_at":"2026-05-18T03:56:34Z","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":"Reversible logic design has become one of the promising research directions in low power dissipating circuit design in the past few years and has found its application in low power CMOS design, digital signal processing and nanotechnology. This paper presents the efficient design approaches of fault tolerant carry skip adders (FTCSAs) and compares those designs with the existing ones. Variable block carry skip logic (VBCSL) using the fault tolerant full adders (FTFAs) has also been developed. The designs are minimized in terms of hardware complexity, gate count, constant inputs and garbage out","authors_text":"Md. Saiful Islam, Mohd. Zulfiquar Hafiz, Muhammad Mahbubur Rahman, Zerina Begum","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2010-09-20T13:53:39Z","title":"Fault Tolerant Variable Block Carry Skip Logic (VBCSL) using Parity Preserving Reversible Gates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.3819","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":"sha256:93c5719a152caf62b952545438f77b4f0a1d4efd161c128e061ba7cf7a64c891","target":"record","created_at":"2026-05-18T03:56:34Z","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":"016c17d00d3624331b3c9614d26bd23d344bc5e2ff1bfe0343433a40c7e75199","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AR","submitted_at":"2010-09-20T13:53:39Z","title_canon_sha256":"9042f56b2097381b69b4f2606e39ac7380980c1f8fcb47182631fbd158ab90ae"},"schema_version":"1.0","source":{"id":"1009.3819","kind":"arxiv","version":1}},"canonical_sha256":"f90c82e06e3105a547a91ac942107244e70ebac6699d4dc9c3c5f66ce84384e8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f90c82e06e3105a547a91ac942107244e70ebac6699d4dc9c3c5f66ce84384e8","first_computed_at":"2026-05-18T03:56:34.210967Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:56:34.210967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eiNFCZJ4wjU9l9+fFA5xPXBrCoD+7O/36YirAE5ZnCU4/WWqKn4eQ2w4wZJq/CI0+cWlTch8Y+/kfkZAT4sXAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:56:34.211436Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.3819","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93c5719a152caf62b952545438f77b4f0a1d4efd161c128e061ba7cf7a64c891","sha256:69639620ab2e57c8397ea361b65c634cece756cea078cc531207fa40cb5d062f"],"state_sha256":"91b3eee65c43a09614795af264e9f2062d1cb7185e241fb9085fdff38c580ecb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LAGWF6Gl0+Fe7UXuWMhtMTigWFZjYpiVNE1qDhCvpTi5u7N1owE+hxjG1WhYQDV/PCN/JPL5JCUEKdsl8o2eCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T19:16:34.452208Z","bundle_sha256":"fa7fd210de8954fe30ddb749a8f3ae1b11d44b4df374528673e11d6915d662e5"}}