{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:BHXX6DTWHYCR3BWDO5HUNVCUNR","short_pith_number":"pith:BHXX6DTW","canonical_record":{"source":{"id":"1203.6408","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2012-03-29T00:26:55Z","cross_cats_sorted":["math.OC"],"title_canon_sha256":"e172f542e52c436597d8ff0eb53a81d22611f4a1e3985a63bb5aa2e01ad8def0","abstract_canon_sha256":"6a90949502eb4c7149792a5923781f8c4e0bfbddd848a45fd80030bf5c234297"},"schema_version":"1.0"},"canonical_sha256":"09ef7f0e763e051d86c3774f46d4546c48cba58e8ac30d49691c0375564e291f","source":{"kind":"arxiv","id":"1203.6408","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.6408","created_at":"2026-05-18T03:59:02Z"},{"alias_kind":"arxiv_version","alias_value":"1203.6408v1","created_at":"2026-05-18T03:59:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.6408","created_at":"2026-05-18T03:59:02Z"},{"alias_kind":"pith_short_12","alias_value":"BHXX6DTWHYCR","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BHXX6DTWHYCR3BWD","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BHXX6DTW","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:BHXX6DTWHYCR3BWDO5HUNVCUNR","target":"record","payload":{"canonical_record":{"source":{"id":"1203.6408","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2012-03-29T00:26:55Z","cross_cats_sorted":["math.OC"],"title_canon_sha256":"e172f542e52c436597d8ff0eb53a81d22611f4a1e3985a63bb5aa2e01ad8def0","abstract_canon_sha256":"6a90949502eb4c7149792a5923781f8c4e0bfbddd848a45fd80030bf5c234297"},"schema_version":"1.0"},"canonical_sha256":"09ef7f0e763e051d86c3774f46d4546c48cba58e8ac30d49691c0375564e291f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:59:02.580402Z","signature_b64":"cS5AxaaJ8FPNCjaEC1e1VZv4onXdE05g+fYIjopyMJ+BCaCaw4hCKUfwtYttKmYFeTRRTSQmFFEtpJW/SeOLCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"09ef7f0e763e051d86c3774f46d4546c48cba58e8ac30d49691c0375564e291f","last_reissued_at":"2026-05-18T03:59:02.579750Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:59:02.579750Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.6408","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":"2026-05-18T03:59:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NnxXEuD3swB1Qg/3amqsw97RiX4w8zkcv3UkiOWvx3QzCQ5MVVT1JS4w4dY9PJHjbGXIjJeyZzVsKLJC26rmBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:52:01.722440Z"},"content_sha256":"99d484b21d7c1545c8ecc4e7b5b38b3415d2c9eafe45281722e50b5c87fe3514","schema_version":"1.0","event_id":"sha256:99d484b21d7c1545c8ecc4e7b5b38b3415d2c9eafe45281722e50b5c87fe3514"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:BHXX6DTWHYCR3BWDO5HUNVCUNR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Formal Abstraction of Linear Systems via Polyhedral Lyapunov Functions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.OC"],"primary_cat":"cs.SY","authors_text":"Calin Belta, Mircea Lazar, Xuchu Ding","submitted_at":"2012-03-29T00:26:55Z","abstract_excerpt":"In this paper we present an abstraction algorithm that produces a finite bisimulation quotient for an autonomous discrete-time linear system. We assume that the bisimulation quotient is required to preserve the observations over an arbitrary, finite number of polytopic subsets of the system state space. We generate the bisimulation quotient with the aid of a sequence of contractive polytopic sublevel sets obtained via a polyhedral Lyapunov function. The proposed algorithm guarantees that at iteration $i$, the bisimulation of the system within the $i$-th sublevel set of the Lyapunov function is"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.6408","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":"2026-05-18T03:59:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z2THlbablZkXcLLvnGuGaxWRqhxaL4L04SEDzSOJPxSW2mj8rpdUkCdThbA384YhQgH6UXKgZLNrnr3P04tTBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:52:01.722778Z"},"content_sha256":"49b30d34d87924a0c7bf79c078f9ac6477128b6f2079e760d02717484e0a1888","schema_version":"1.0","event_id":"sha256:49b30d34d87924a0c7bf79c078f9ac6477128b6f2079e760d02717484e0a1888"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BHXX6DTWHYCR3BWDO5HUNVCUNR/bundle.json","state_url":"https://pith.science/pith/BHXX6DTWHYCR3BWDO5HUNVCUNR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BHXX6DTWHYCR3BWDO5HUNVCUNR/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":"2026-06-10T21:52:01Z","links":{"resolver":"https://pith.science/pith/BHXX6DTWHYCR3BWDO5HUNVCUNR","bundle":"https://pith.science/pith/BHXX6DTWHYCR3BWDO5HUNVCUNR/bundle.json","state":"https://pith.science/pith/BHXX6DTWHYCR3BWDO5HUNVCUNR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BHXX6DTWHYCR3BWDO5HUNVCUNR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:BHXX6DTWHYCR3BWDO5HUNVCUNR","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":"6a90949502eb4c7149792a5923781f8c4e0bfbddd848a45fd80030bf5c234297","cross_cats_sorted":["math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2012-03-29T00:26:55Z","title_canon_sha256":"e172f542e52c436597d8ff0eb53a81d22611f4a1e3985a63bb5aa2e01ad8def0"},"schema_version":"1.0","source":{"id":"1203.6408","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.6408","created_at":"2026-05-18T03:59:02Z"},{"alias_kind":"arxiv_version","alias_value":"1203.6408v1","created_at":"2026-05-18T03:59:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.6408","created_at":"2026-05-18T03:59:02Z"},{"alias_kind":"pith_short_12","alias_value":"BHXX6DTWHYCR","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BHXX6DTWHYCR3BWD","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BHXX6DTW","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:49b30d34d87924a0c7bf79c078f9ac6477128b6f2079e760d02717484e0a1888","target":"graph","created_at":"2026-05-18T03:59:02Z","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":"In this paper we present an abstraction algorithm that produces a finite bisimulation quotient for an autonomous discrete-time linear system. We assume that the bisimulation quotient is required to preserve the observations over an arbitrary, finite number of polytopic subsets of the system state space. We generate the bisimulation quotient with the aid of a sequence of contractive polytopic sublevel sets obtained via a polyhedral Lyapunov function. The proposed algorithm guarantees that at iteration $i$, the bisimulation of the system within the $i$-th sublevel set of the Lyapunov function is","authors_text":"Calin Belta, Mircea Lazar, Xuchu Ding","cross_cats":["math.OC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2012-03-29T00:26:55Z","title":"Formal Abstraction of Linear Systems via Polyhedral Lyapunov Functions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.6408","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":"sha256:99d484b21d7c1545c8ecc4e7b5b38b3415d2c9eafe45281722e50b5c87fe3514","target":"record","created_at":"2026-05-18T03:59:02Z","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":"6a90949502eb4c7149792a5923781f8c4e0bfbddd848a45fd80030bf5c234297","cross_cats_sorted":["math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2012-03-29T00:26:55Z","title_canon_sha256":"e172f542e52c436597d8ff0eb53a81d22611f4a1e3985a63bb5aa2e01ad8def0"},"schema_version":"1.0","source":{"id":"1203.6408","kind":"arxiv","version":1}},"canonical_sha256":"09ef7f0e763e051d86c3774f46d4546c48cba58e8ac30d49691c0375564e291f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"09ef7f0e763e051d86c3774f46d4546c48cba58e8ac30d49691c0375564e291f","first_computed_at":"2026-05-18T03:59:02.579750Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:59:02.579750Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cS5AxaaJ8FPNCjaEC1e1VZv4onXdE05g+fYIjopyMJ+BCaCaw4hCKUfwtYttKmYFeTRRTSQmFFEtpJW/SeOLCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:59:02.580402Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.6408","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99d484b21d7c1545c8ecc4e7b5b38b3415d2c9eafe45281722e50b5c87fe3514","sha256:49b30d34d87924a0c7bf79c078f9ac6477128b6f2079e760d02717484e0a1888"],"state_sha256":"c0989f7e15c46d1753c854f51f0a1f0c5260737dec045ef4752ee5a19aec0f47"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SaSmfFbkVZ3B6i4QNecjrrHD/oRfn6NZ+TZfAnGklK6GqNMVMPHukLz+zQ71oNmqk5jKKH3dfbGbCtz0B9TICg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T21:52:01.724703Z","bundle_sha256":"40666a5e99527a6d48cc17b1d4016935c058be9b033fdbe4c5a626c2d82e84a5"}}