{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:HHSNZGPRNUOUDML7U7FZO6FZSI","short_pith_number":"pith:HHSNZGPR","canonical_record":{"source":{"id":"2007.00102","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2020-06-30T21:01:52Z","cross_cats_sorted":["cs.LO"],"title_canon_sha256":"298972384139fab3422846ed6496f480ce8786bda536dad65fb16a53c9239dc1","abstract_canon_sha256":"d6db0537a5f46cdfa611a8a2fa541cc5005e13c8aac7eb387a33c5951f12a285"},"schema_version":"1.0"},"canonical_sha256":"39e4dc99f16d1d41b17fa7cb9778b992292fd031a8bab6b609e0c8c889081eea","source":{"kind":"arxiv","id":"2007.00102","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.00102","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"arxiv_version","alias_value":"2007.00102v1","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.00102","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"pith_short_12","alias_value":"HHSNZGPRNUOU","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"pith_short_16","alias_value":"HHSNZGPRNUOUDML7","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"pith_short_8","alias_value":"HHSNZGPR","created_at":"2026-07-05T01:15:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:HHSNZGPRNUOUDML7U7FZO6FZSI","target":"record","payload":{"canonical_record":{"source":{"id":"2007.00102","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2020-06-30T21:01:52Z","cross_cats_sorted":["cs.LO"],"title_canon_sha256":"298972384139fab3422846ed6496f480ce8786bda536dad65fb16a53c9239dc1","abstract_canon_sha256":"d6db0537a5f46cdfa611a8a2fa541cc5005e13c8aac7eb387a33c5951f12a285"},"schema_version":"1.0"},"canonical_sha256":"39e4dc99f16d1d41b17fa7cb9778b992292fd031a8bab6b609e0c8c889081eea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:15:28.192203Z","signature_b64":"KQtwQcXd30BR6k+dyzwnjKjPWx7NHmtVL0lItVOOh2Xr2d1IrJHLXTOFhAnWzwF1EXlEcEZDlnScHGZUZJEHDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39e4dc99f16d1d41b17fa7cb9778b992292fd031a8bab6b609e0c8c889081eea","last_reissued_at":"2026-07-05T01:15:28.191863Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:15:28.191863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.00102","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":"2026-07-05T01:15:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HxvcjvEMMiZLfPYXWhlSvKQfuGPOtNu8UcC/U39wqR/IxnxOFDHhzWETVA3nxmTntF3lc+RDrkdvDke8DgBrCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T23:30:32.701402Z"},"content_sha256":"da46979f5b42602ac9118c52d720e9fcfc27d9b3e01fc3e1784d4427a3c26d28","schema_version":"1.0","event_id":"sha256:da46979f5b42602ac9118c52d720e9fcfc27d9b3e01fc3e1784d4427a3c26d28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:HHSNZGPRNUOUDML7U7FZO6FZSI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Verification of indefinite-horizon POMDPs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LO"],"primary_cat":"cs.AI","authors_text":"Alexander Bork, Joost-Pieter Katoen, Sebastian Junges, Tim Quatmann","submitted_at":"2020-06-30T21:01:52Z","abstract_excerpt":"The verification problem in MDPs asks whether, for any policy resolving the nondeterminism, the probability that something bad happens is bounded by some given threshold. This verification problem is often overly pessimistic, as the policies it considers may depend on the complete system state. This paper considers the verification problem for partially observable MDPs, in which the policies make their decisions based on (the history of) the observations emitted by the system. We present an abstraction-refinement framework extending previous instantiations of the Lovejoy-approach. Our experime"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.00102","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/2007.00102/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":"2026-07-05T01:15:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lTBbSRcywBNj9zsy4LdLPQZg1QCc5/YwTfBCN172t/YKQdJ4Z10uIPKSVcnMQ8ODM8bzFgXUyGypFHyu3//fDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T23:30:32.702106Z"},"content_sha256":"468277717a5ce597e23e00145ce2892b027ddbfc910f66d51728785eee9e9af6","schema_version":"1.0","event_id":"sha256:468277717a5ce597e23e00145ce2892b027ddbfc910f66d51728785eee9e9af6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HHSNZGPRNUOUDML7U7FZO6FZSI/bundle.json","state_url":"https://pith.science/pith/HHSNZGPRNUOUDML7U7FZO6FZSI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HHSNZGPRNUOUDML7U7FZO6FZSI/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":"2026-08-04T23:30:32Z","links":{"resolver":"https://pith.science/pith/HHSNZGPRNUOUDML7U7FZO6FZSI","bundle":"https://pith.science/pith/HHSNZGPRNUOUDML7U7FZO6FZSI/bundle.json","state":"https://pith.science/pith/HHSNZGPRNUOUDML7U7FZO6FZSI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HHSNZGPRNUOUDML7U7FZO6FZSI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:HHSNZGPRNUOUDML7U7FZO6FZSI","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":"d6db0537a5f46cdfa611a8a2fa541cc5005e13c8aac7eb387a33c5951f12a285","cross_cats_sorted":["cs.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2020-06-30T21:01:52Z","title_canon_sha256":"298972384139fab3422846ed6496f480ce8786bda536dad65fb16a53c9239dc1"},"schema_version":"1.0","source":{"id":"2007.00102","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.00102","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"arxiv_version","alias_value":"2007.00102v1","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.00102","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"pith_short_12","alias_value":"HHSNZGPRNUOU","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"pith_short_16","alias_value":"HHSNZGPRNUOUDML7","created_at":"2026-07-05T01:15:28Z"},{"alias_kind":"pith_short_8","alias_value":"HHSNZGPR","created_at":"2026-07-05T01:15:28Z"}],"graph_snapshots":[{"event_id":"sha256:468277717a5ce597e23e00145ce2892b027ddbfc910f66d51728785eee9e9af6","target":"graph","created_at":"2026-07-05T01:15:28Z","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/2007.00102/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The verification problem in MDPs asks whether, for any policy resolving the nondeterminism, the probability that something bad happens is bounded by some given threshold. This verification problem is often overly pessimistic, as the policies it considers may depend on the complete system state. This paper considers the verification problem for partially observable MDPs, in which the policies make their decisions based on (the history of) the observations emitted by the system. We present an abstraction-refinement framework extending previous instantiations of the Lovejoy-approach. Our experime","authors_text":"Alexander Bork, Joost-Pieter Katoen, Sebastian Junges, Tim Quatmann","cross_cats":["cs.LO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2020-06-30T21:01:52Z","title":"Verification of indefinite-horizon POMDPs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.00102","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:da46979f5b42602ac9118c52d720e9fcfc27d9b3e01fc3e1784d4427a3c26d28","target":"record","created_at":"2026-07-05T01:15:28Z","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":"d6db0537a5f46cdfa611a8a2fa541cc5005e13c8aac7eb387a33c5951f12a285","cross_cats_sorted":["cs.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2020-06-30T21:01:52Z","title_canon_sha256":"298972384139fab3422846ed6496f480ce8786bda536dad65fb16a53c9239dc1"},"schema_version":"1.0","source":{"id":"2007.00102","kind":"arxiv","version":1}},"canonical_sha256":"39e4dc99f16d1d41b17fa7cb9778b992292fd031a8bab6b609e0c8c889081eea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39e4dc99f16d1d41b17fa7cb9778b992292fd031a8bab6b609e0c8c889081eea","first_computed_at":"2026-07-05T01:15:28.191863Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:15:28.191863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KQtwQcXd30BR6k+dyzwnjKjPWx7NHmtVL0lItVOOh2Xr2d1IrJHLXTOFhAnWzwF1EXlEcEZDlnScHGZUZJEHDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:15:28.192203Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.00102","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da46979f5b42602ac9118c52d720e9fcfc27d9b3e01fc3e1784d4427a3c26d28","sha256:468277717a5ce597e23e00145ce2892b027ddbfc910f66d51728785eee9e9af6"],"state_sha256":"5223eb18025cbf65d4fec6df146d2d3daeef200a2f802b05fcbeed8afb858cf5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jgoaKZQTZsXvRYmINqMtq8G0wVS72vG/nsTLKoQFWkp8e5YmPgEl0uk/IBCvRSV4nvLeSR2pqjxfiYrb4M6oDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T23:30:32.707637Z","bundle_sha256":"6e4a10485a71dc4f622c066f4e2d97cbb9ee4e063e4594f02b5accd11975c38e"}}