{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:C5373IHSZBRWNT5KLGGERXQIJB","short_pith_number":"pith:C5373IHS","canonical_record":{"source":{"id":"0906.2727","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2009-06-15T15:44:56Z","cross_cats_sorted":["cs.LO"],"title_canon_sha256":"70cf9aa4faedbcaef1cba3eb482eabb65b9b81907b85894f8a14c958a7bec2eb","abstract_canon_sha256":"c61213a388b16d3c537ee2169e39ca309c8cd068bd3a91641d6cd7ad50ddddc7"},"schema_version":"1.0"},"canonical_sha256":"1777fda0f2c86366cfaa598c48de084848251dc55203c106a528e745dfa7d64d","source":{"kind":"arxiv","id":"0906.2727","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.2727","created_at":"2026-05-18T01:37:40Z"},{"alias_kind":"arxiv_version","alias_value":"0906.2727v2","created_at":"2026-05-18T01:37:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.2727","created_at":"2026-05-18T01:37:40Z"},{"alias_kind":"pith_short_12","alias_value":"C5373IHSZBRW","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"C5373IHSZBRWNT5K","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"C5373IHS","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:C5373IHSZBRWNT5KLGGERXQIJB","target":"record","payload":{"canonical_record":{"source":{"id":"0906.2727","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2009-06-15T15:44:56Z","cross_cats_sorted":["cs.LO"],"title_canon_sha256":"70cf9aa4faedbcaef1cba3eb482eabb65b9b81907b85894f8a14c958a7bec2eb","abstract_canon_sha256":"c61213a388b16d3c537ee2169e39ca309c8cd068bd3a91641d6cd7ad50ddddc7"},"schema_version":"1.0"},"canonical_sha256":"1777fda0f2c86366cfaa598c48de084848251dc55203c106a528e745dfa7d64d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:40.349033Z","signature_b64":"YzqAJfmA2apX7a+Aw9WoFUx10VDJQMUBhjKA+UMG2kEvOE5J9tVNFU5fKv6OH2OxJoyZ/cRNYC3+4wvqkXK/Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1777fda0f2c86366cfaa598c48de084848251dc55203c106a528e745dfa7d64d","last_reissued_at":"2026-05-18T01:37:40.348236Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:40.348236Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.2727","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tyoUno15Kc+qUi0+yqCvPgXJcufwZdZYwpkqtH536suLT3Vfs82yLVlRCCv/l+/LuIbN0fHme32M8uQs99AwCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:46:18.937242Z"},"content_sha256":"027159a96ae4686ecde28cdcd24a42361c951ebda2f4b731e3074ed677ac9216","schema_version":"1.0","event_id":"sha256:027159a96ae4686ecde28cdcd24a42361c951ebda2f4b731e3074ed677ac9216"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:C5373IHSZBRWNT5KLGGERXQIJB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"RPO, Second-order Contexts, and Lambda-calculus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LO"],"primary_cat":"cs.PL","authors_text":"Furio Honsell, Marina Lenisa, Pietro Di Gianantonio","submitted_at":"2009-06-15T15:44:56Z","abstract_excerpt":"First, we extend Leifer-Milner RPO theory, by giving general conditions to obtain IPO labelled transition systems (and bisimilarities) with a reduced set of transitions, and possibly finitely branching. Moreover, we study the weak variant of Leifer-Milner theory, by giving general conditions under which the weak bisimilarity is a congruence. Then, we apply such extended RPO technique to the lambda-calculus, endowed with lazy and call by value reduction strategies.\n  We show that, contrary to process calculi, one can deal directly with the lambda-calculus syntax and apply Leifer-Milner techniqu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.2727","kind":"arxiv","version":2},"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":"2026-05-18T01:37:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1I3qJShIWlDV3WPaP3fIARnQmsjH8KewGVsqbehBDJ7BsacWosuLiAzPnldMWNw9wFvZdSesYHSyOasEoGxBBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:46:18.937609Z"},"content_sha256":"41cd34d1351c10cb3dc92844fcf706fcc9b526a1e8f4b6e1e5e84c7fdd3a80de","schema_version":"1.0","event_id":"sha256:41cd34d1351c10cb3dc92844fcf706fcc9b526a1e8f4b6e1e5e84c7fdd3a80de"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C5373IHSZBRWNT5KLGGERXQIJB/bundle.json","state_url":"https://pith.science/pith/C5373IHSZBRWNT5KLGGERXQIJB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C5373IHSZBRWNT5KLGGERXQIJB/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":"2026-06-03T07:46:18Z","links":{"resolver":"https://pith.science/pith/C5373IHSZBRWNT5KLGGERXQIJB","bundle":"https://pith.science/pith/C5373IHSZBRWNT5KLGGERXQIJB/bundle.json","state":"https://pith.science/pith/C5373IHSZBRWNT5KLGGERXQIJB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C5373IHSZBRWNT5KLGGERXQIJB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:C5373IHSZBRWNT5KLGGERXQIJB","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":"c61213a388b16d3c537ee2169e39ca309c8cd068bd3a91641d6cd7ad50ddddc7","cross_cats_sorted":["cs.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2009-06-15T15:44:56Z","title_canon_sha256":"70cf9aa4faedbcaef1cba3eb482eabb65b9b81907b85894f8a14c958a7bec2eb"},"schema_version":"1.0","source":{"id":"0906.2727","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.2727","created_at":"2026-05-18T01:37:40Z"},{"alias_kind":"arxiv_version","alias_value":"0906.2727v2","created_at":"2026-05-18T01:37:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.2727","created_at":"2026-05-18T01:37:40Z"},{"alias_kind":"pith_short_12","alias_value":"C5373IHSZBRW","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"C5373IHSZBRWNT5K","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"C5373IHS","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:41cd34d1351c10cb3dc92844fcf706fcc9b526a1e8f4b6e1e5e84c7fdd3a80de","target":"graph","created_at":"2026-05-18T01:37:40Z","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":"First, we extend Leifer-Milner RPO theory, by giving general conditions to obtain IPO labelled transition systems (and bisimilarities) with a reduced set of transitions, and possibly finitely branching. Moreover, we study the weak variant of Leifer-Milner theory, by giving general conditions under which the weak bisimilarity is a congruence. Then, we apply such extended RPO technique to the lambda-calculus, endowed with lazy and call by value reduction strategies.\n  We show that, contrary to process calculi, one can deal directly with the lambda-calculus syntax and apply Leifer-Milner techniqu","authors_text":"Furio Honsell, Marina Lenisa, Pietro Di Gianantonio","cross_cats":["cs.LO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2009-06-15T15:44:56Z","title":"RPO, Second-order Contexts, and Lambda-calculus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.2727","kind":"arxiv","version":2},"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":"sha256:027159a96ae4686ecde28cdcd24a42361c951ebda2f4b731e3074ed677ac9216","target":"record","created_at":"2026-05-18T01:37:40Z","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":"c61213a388b16d3c537ee2169e39ca309c8cd068bd3a91641d6cd7ad50ddddc7","cross_cats_sorted":["cs.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2009-06-15T15:44:56Z","title_canon_sha256":"70cf9aa4faedbcaef1cba3eb482eabb65b9b81907b85894f8a14c958a7bec2eb"},"schema_version":"1.0","source":{"id":"0906.2727","kind":"arxiv","version":2}},"canonical_sha256":"1777fda0f2c86366cfaa598c48de084848251dc55203c106a528e745dfa7d64d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1777fda0f2c86366cfaa598c48de084848251dc55203c106a528e745dfa7d64d","first_computed_at":"2026-05-18T01:37:40.348236Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:40.348236Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YzqAJfmA2apX7a+Aw9WoFUx10VDJQMUBhjKA+UMG2kEvOE5J9tVNFU5fKv6OH2OxJoyZ/cRNYC3+4wvqkXK/Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:40.349033Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.2727","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:027159a96ae4686ecde28cdcd24a42361c951ebda2f4b731e3074ed677ac9216","sha256:41cd34d1351c10cb3dc92844fcf706fcc9b526a1e8f4b6e1e5e84c7fdd3a80de"],"state_sha256":"01416eed8390a6d6652b755e5329a053b31f3a3171cafe8ffe333b59e6fc99d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2g0rswOVBhMCS63wdvKh1gyMN9DDPEH1C9ol6urmhCC7FwqhYhz8Wl1sTT3/t4YFwWSZvdVvohQ/BqVMdPJWDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T07:46:18.939595Z","bundle_sha256":"ef8f7a9912101bef5ecdac5cc561f5362ed1b1f8936d91043b063791de471daf"}}