{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:2IKDCPMXWL7ILGY7GAN6QQ5NUG","short_pith_number":"pith:2IKDCPMX","canonical_record":{"source":{"id":"1604.02474","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2016-04-08T20:30:12Z","cross_cats_sorted":[],"title_canon_sha256":"662e74ac1da9f61df1990ae4a40b96b90407cf2695fba9873684a545ede7dfea","abstract_canon_sha256":"69e58ca97a284505fa0e71fd91a41a07e7af4c1e63669b5918ef333a1146340c"},"schema_version":"1.0"},"canonical_sha256":"d214313d97b2fe859b1f301be843ada19f8e382a38e992143127760fcefbf65e","source":{"kind":"arxiv","id":"1604.02474","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02474","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02474v4","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02474","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"pith_short_12","alias_value":"2IKDCPMXWL7I","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2IKDCPMXWL7ILGY7","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2IKDCPMX","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:2IKDCPMXWL7ILGY7GAN6QQ5NUG","target":"record","payload":{"canonical_record":{"source":{"id":"1604.02474","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2016-04-08T20:30:12Z","cross_cats_sorted":[],"title_canon_sha256":"662e74ac1da9f61df1990ae4a40b96b90407cf2695fba9873684a545ede7dfea","abstract_canon_sha256":"69e58ca97a284505fa0e71fd91a41a07e7af4c1e63669b5918ef333a1146340c"},"schema_version":"1.0"},"canonical_sha256":"d214313d97b2fe859b1f301be843ada19f8e382a38e992143127760fcefbf65e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:02.955446Z","signature_b64":"Hg+M2SqxuVGSH5KlFguU1IZ6eZHIws7a6WgvCl6rDkG8VJN7teAu9r9E0GTzrUbGSEqh6IZdCCV6iJPzunczBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d214313d97b2fe859b1f301be843ada19f8e382a38e992143127760fcefbf65e","last_reissued_at":"2026-05-18T00:43:02.954641Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:02.954641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.02474","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:43:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6DuRXPixfB9FmmriynNrFHJK+QWzOa+5fGwWPpAxoaUAPEipONJysiXnVtGiH+/8WyUpcktIEJ95vCm471t8CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:32:40.857580Z"},"content_sha256":"14329f9a8d7fa08e17aeff8b91cc209442d36fa6a81ba58618cb1362745f07c7","schema_version":"1.0","event_id":"sha256:14329f9a8d7fa08e17aeff8b91cc209442d36fa6a81ba58618cb1362745f07c7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:2IKDCPMXWL7ILGY7GAN6QQ5NUG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Space-Efficient Latent Contracts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.PL","authors_text":"Michael Greenberg","submitted_at":"2016-04-08T20:30:12Z","abstract_excerpt":"Standard higher-order contract monitoring breaks tail recursion and leads to space leaks that can change a program's asymptotic complexity; space-efficiency restores tail recursion and bounds the amount of space used by contracts. Space-efficient contract monitoring for contracts enforcing simple type disciplines (a/k/a gradual typing) is well studied. Prior work establishes a space-efficient semantics for manifest contracts without dependency (Greenberg 2015); we adapt that work to a latent calculus with dependency. We guarantee space efficiency when no dependency is used; we cannot generally"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02474","kind":"arxiv","version":4},"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":"2026-05-18T00:43:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oJxPGV5u0rz2BCvz6RYaJ+StprLZ3BjUcGh61zarXlX13dFWYmKMZSgH8/3PA98l7hUKFkxVeFvJzsFmjlLKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:32:40.857962Z"},"content_sha256":"c1d77ae6c8afb6b1f72bc998f1370f293bd69486100be0d7c70463fc51915ba0","schema_version":"1.0","event_id":"sha256:c1d77ae6c8afb6b1f72bc998f1370f293bd69486100be0d7c70463fc51915ba0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2IKDCPMXWL7ILGY7GAN6QQ5NUG/bundle.json","state_url":"https://pith.science/pith/2IKDCPMXWL7ILGY7GAN6QQ5NUG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2IKDCPMXWL7ILGY7GAN6QQ5NUG/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":"2026-05-30T06:32:40Z","links":{"resolver":"https://pith.science/pith/2IKDCPMXWL7ILGY7GAN6QQ5NUG","bundle":"https://pith.science/pith/2IKDCPMXWL7ILGY7GAN6QQ5NUG/bundle.json","state":"https://pith.science/pith/2IKDCPMXWL7ILGY7GAN6QQ5NUG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2IKDCPMXWL7ILGY7GAN6QQ5NUG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:2IKDCPMXWL7ILGY7GAN6QQ5NUG","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":"69e58ca97a284505fa0e71fd91a41a07e7af4c1e63669b5918ef333a1146340c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2016-04-08T20:30:12Z","title_canon_sha256":"662e74ac1da9f61df1990ae4a40b96b90407cf2695fba9873684a545ede7dfea"},"schema_version":"1.0","source":{"id":"1604.02474","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02474","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02474v4","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02474","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"pith_short_12","alias_value":"2IKDCPMXWL7I","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2IKDCPMXWL7ILGY7","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2IKDCPMX","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:c1d77ae6c8afb6b1f72bc998f1370f293bd69486100be0d7c70463fc51915ba0","target":"graph","created_at":"2026-05-18T00:43:02Z","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":"Standard higher-order contract monitoring breaks tail recursion and leads to space leaks that can change a program's asymptotic complexity; space-efficiency restores tail recursion and bounds the amount of space used by contracts. Space-efficient contract monitoring for contracts enforcing simple type disciplines (a/k/a gradual typing) is well studied. Prior work establishes a space-efficient semantics for manifest contracts without dependency (Greenberg 2015); we adapt that work to a latent calculus with dependency. We guarantee space efficiency when no dependency is used; we cannot generally","authors_text":"Michael Greenberg","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2016-04-08T20:30:12Z","title":"Space-Efficient Latent Contracts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02474","kind":"arxiv","version":4},"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":"sha256:14329f9a8d7fa08e17aeff8b91cc209442d36fa6a81ba58618cb1362745f07c7","target":"record","created_at":"2026-05-18T00:43:02Z","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":"69e58ca97a284505fa0e71fd91a41a07e7af4c1e63669b5918ef333a1146340c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2016-04-08T20:30:12Z","title_canon_sha256":"662e74ac1da9f61df1990ae4a40b96b90407cf2695fba9873684a545ede7dfea"},"schema_version":"1.0","source":{"id":"1604.02474","kind":"arxiv","version":4}},"canonical_sha256":"d214313d97b2fe859b1f301be843ada19f8e382a38e992143127760fcefbf65e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d214313d97b2fe859b1f301be843ada19f8e382a38e992143127760fcefbf65e","first_computed_at":"2026-05-18T00:43:02.954641Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:02.954641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hg+M2SqxuVGSH5KlFguU1IZ6eZHIws7a6WgvCl6rDkG8VJN7teAu9r9E0GTzrUbGSEqh6IZdCCV6iJPzunczBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:02.955446Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.02474","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14329f9a8d7fa08e17aeff8b91cc209442d36fa6a81ba58618cb1362745f07c7","sha256:c1d77ae6c8afb6b1f72bc998f1370f293bd69486100be0d7c70463fc51915ba0"],"state_sha256":"d238cb801136bc216f2c82f8f09daca8629092e9581861d537b1b1fb83c3d7ab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cvtf4MFQul2iLsPVkeX33R7gS9u+8JD7Zjxl65DXDu+M4rpDwGQ4zPT8dqTg8sfiyw+T1rH16k5L4d083mNYAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T06:32:40.861118Z","bundle_sha256":"974b7cf7c34bb3cfa0d1bc57f4db4687e87bfffb37d950c4c5d5fb0192990b4e"}}