{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HJQTI5QFX2PJVXCW7LV67JM7PD","short_pith_number":"pith:HJQTI5QF","canonical_record":{"source":{"id":"1605.00065","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2016-04-30T05:22:21Z","cross_cats_sorted":["cs.DM"],"title_canon_sha256":"672f783cfbb8dda58f36a04efa33a5bf8ce96b830d25cdb3fbdaa014bbff91c8","abstract_canon_sha256":"68f3bf458f4c02d2a43054a3f891e7cc8a08abb0e3adbcd5b0ce20f473ca2841"},"schema_version":"1.0"},"canonical_sha256":"3a61347605be9e9adc56faebefa59f78c8d76f567391d57a6900cfcddf208c60","source":{"kind":"arxiv","id":"1605.00065","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.00065","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"1605.00065v1","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.00065","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"HJQTI5QFX2PJ","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HJQTI5QFX2PJVXCW","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HJQTI5QF","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HJQTI5QFX2PJVXCW7LV67JM7PD","target":"record","payload":{"canonical_record":{"source":{"id":"1605.00065","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2016-04-30T05:22:21Z","cross_cats_sorted":["cs.DM"],"title_canon_sha256":"672f783cfbb8dda58f36a04efa33a5bf8ce96b830d25cdb3fbdaa014bbff91c8","abstract_canon_sha256":"68f3bf458f4c02d2a43054a3f891e7cc8a08abb0e3adbcd5b0ce20f473ca2841"},"schema_version":"1.0"},"canonical_sha256":"3a61347605be9e9adc56faebefa59f78c8d76f567391d57a6900cfcddf208c60","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:38.068763Z","signature_b64":"zcAdAXPHM3+uEDkLp43EvOprDgEc36cdUqpIJvzFSJEX4kQz2jKk/2lpJd7GPJD7IKA7jexUZcV5Hskmk6eaAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a61347605be9e9adc56faebefa59f78c8d76f567391d57a6900cfcddf208c60","last_reissued_at":"2026-05-18T01:15:38.068132Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:38.068132Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.00065","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":"2026-05-18T01:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e2wVXJRMJ7EQhU2xlZW2kbXclHbqF9cObijB65TCf5L46jh9Vc0BvhZsYTdtEHhRf7N2K+/H4zpz+RLIhW1wBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:29:21.333898Z"},"content_sha256":"f13505bfdb31bf05c742d5c5e7b783a4f12b934c78de4ff99955f48c1c5b43fb","schema_version":"1.0","event_id":"sha256:f13505bfdb31bf05c742d5c5e7b783a4f12b934c78de4ff99955f48c1c5b43fb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HJQTI5QFX2PJVXCW7LV67JM7PD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improved Algorithms for the Evacuation Route Planning Problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.DM"],"primary_cat":"cs.DS","authors_text":"Arindam Pal, Gopinath Mishra, Subhra Mazumdar","submitted_at":"2016-04-30T05:22:21Z","abstract_excerpt":"Emergency evacuation is the process of movement of people away from the threat or actual occurrence of hazards such as natural disasters, terrorist attacks, fires and bombs. In this paper, we focus on evacuation from a building, but the ideas can be applied to city and region evacuation. We define the problem and show how it can be modeled using graphs. The resulting optimization problem can be formulated as an integer linear program. Though this can be solved exactly, this approach does not scale well for graphs with thousands of nodes and several hundred thousands of edges. This is impractic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.00065","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":"2026-05-18T01:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UaOuU64v9vQRlQL7IGb+WioXCiTEctjlYAOiVfvo+HFaG9k5O/VXh6ErH+JSWezeAX9SLLHXyZmBYJlucA1jAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:29:21.334273Z"},"content_sha256":"168079ad984abc7cb606c2ff1f40d7be1ba7ba14b86e0a91e99ba2818cf2e7ec","schema_version":"1.0","event_id":"sha256:168079ad984abc7cb606c2ff1f40d7be1ba7ba14b86e0a91e99ba2818cf2e7ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HJQTI5QFX2PJVXCW7LV67JM7PD/bundle.json","state_url":"https://pith.science/pith/HJQTI5QFX2PJVXCW7LV67JM7PD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HJQTI5QFX2PJVXCW7LV67JM7PD/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":"2026-05-27T10:29:21Z","links":{"resolver":"https://pith.science/pith/HJQTI5QFX2PJVXCW7LV67JM7PD","bundle":"https://pith.science/pith/HJQTI5QFX2PJVXCW7LV67JM7PD/bundle.json","state":"https://pith.science/pith/HJQTI5QFX2PJVXCW7LV67JM7PD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HJQTI5QFX2PJVXCW7LV67JM7PD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HJQTI5QFX2PJVXCW7LV67JM7PD","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":"68f3bf458f4c02d2a43054a3f891e7cc8a08abb0e3adbcd5b0ce20f473ca2841","cross_cats_sorted":["cs.DM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2016-04-30T05:22:21Z","title_canon_sha256":"672f783cfbb8dda58f36a04efa33a5bf8ce96b830d25cdb3fbdaa014bbff91c8"},"schema_version":"1.0","source":{"id":"1605.00065","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.00065","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"1605.00065v1","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.00065","created_at":"2026-05-18T01:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"HJQTI5QFX2PJ","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HJQTI5QFX2PJVXCW","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HJQTI5QF","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:168079ad984abc7cb606c2ff1f40d7be1ba7ba14b86e0a91e99ba2818cf2e7ec","target":"graph","created_at":"2026-05-18T01:15:38Z","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":"Emergency evacuation is the process of movement of people away from the threat or actual occurrence of hazards such as natural disasters, terrorist attacks, fires and bombs. In this paper, we focus on evacuation from a building, but the ideas can be applied to city and region evacuation. We define the problem and show how it can be modeled using graphs. The resulting optimization problem can be formulated as an integer linear program. Though this can be solved exactly, this approach does not scale well for graphs with thousands of nodes and several hundred thousands of edges. This is impractic","authors_text":"Arindam Pal, Gopinath Mishra, Subhra Mazumdar","cross_cats":["cs.DM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2016-04-30T05:22:21Z","title":"Improved Algorithms for the Evacuation Route Planning Problem"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.00065","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:f13505bfdb31bf05c742d5c5e7b783a4f12b934c78de4ff99955f48c1c5b43fb","target":"record","created_at":"2026-05-18T01:15:38Z","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":"68f3bf458f4c02d2a43054a3f891e7cc8a08abb0e3adbcd5b0ce20f473ca2841","cross_cats_sorted":["cs.DM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2016-04-30T05:22:21Z","title_canon_sha256":"672f783cfbb8dda58f36a04efa33a5bf8ce96b830d25cdb3fbdaa014bbff91c8"},"schema_version":"1.0","source":{"id":"1605.00065","kind":"arxiv","version":1}},"canonical_sha256":"3a61347605be9e9adc56faebefa59f78c8d76f567391d57a6900cfcddf208c60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3a61347605be9e9adc56faebefa59f78c8d76f567391d57a6900cfcddf208c60","first_computed_at":"2026-05-18T01:15:38.068132Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:38.068132Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zcAdAXPHM3+uEDkLp43EvOprDgEc36cdUqpIJvzFSJEX4kQz2jKk/2lpJd7GPJD7IKA7jexUZcV5Hskmk6eaAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:38.068763Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.00065","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f13505bfdb31bf05c742d5c5e7b783a4f12b934c78de4ff99955f48c1c5b43fb","sha256:168079ad984abc7cb606c2ff1f40d7be1ba7ba14b86e0a91e99ba2818cf2e7ec"],"state_sha256":"91f8584e6992ae4dc5fd00cc0c96679baa65344c2c8b6dd5ab912b51e0084b65"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UQmW/wk1Acncr/R9zHSjXIxUYSTyKynJlbZgYhVuy5h+rkzTdbS1BhV9FuQwnT91j4Sy0ISCnL+SApEAgigCCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T10:29:21.337781Z","bundle_sha256":"9895dd09072609a52d15cfa64b30722da65bea7f3d9a4037d5b6397f35978804"}}