{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DYT5UT5D2P7GAABD6U35FOGW4X","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":"e4e68e65269a5acf46017d390763442919b0c45403a02924520ece77670ecd77","cross_cats_sorted":["cs.GT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2015-10-04T08:23:36Z","title_canon_sha256":"11ab82c2b360d49c061a4795cd79d494c016e8b1b8228d784751a5455effe76a"},"schema_version":"1.0","source":{"id":"1510.00914","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.00914","created_at":"2026-05-18T01:03:44Z"},{"alias_kind":"arxiv_version","alias_value":"1510.00914v3","created_at":"2026-05-18T01:03:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.00914","created_at":"2026-05-18T01:03:44Z"},{"alias_kind":"pith_short_12","alias_value":"DYT5UT5D2P7G","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DYT5UT5D2P7GAABD","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DYT5UT5D","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:87277647bd78ef640286851f873c8a1bb26a1855a7f41cb1df3bd9c0a4602c31","target":"graph","created_at":"2026-05-18T01:03:44Z","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":"Strategies incorporating direct reciprocity, e.g., Tit-for-Tat and Pavlov, have been shown to be successful for playing the Iterated Prisoners Dilemma (IPD), a paradigmatic problem for studying the evolution of cooperation among non-kin individuals. However it is an open question whether such reciprocal strategies can emerge as the rational outcome of repeated interactions between selfish agents. Here we show that adopting a co-action perspective, which takes into account the symmetry between agents - a relevant consideration in biological and social contexts - naturally leads to such a strate","authors_text":"Sitabhra Sinha, V. Sasidevan","cross_cats":["cs.GT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2015-10-04T08:23:36Z","title":"Co-action provides rational basis for the evolutionary success of Pavlovian strategies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.00914","kind":"arxiv","version":3},"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":"sha256:427d759e1f84fa237702a036df845285f819c0032902af8f9dce65c94815989b","target":"record","created_at":"2026-05-18T01:03:44Z","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":"e4e68e65269a5acf46017d390763442919b0c45403a02924520ece77670ecd77","cross_cats_sorted":["cs.GT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2015-10-04T08:23:36Z","title_canon_sha256":"11ab82c2b360d49c061a4795cd79d494c016e8b1b8228d784751a5455effe76a"},"schema_version":"1.0","source":{"id":"1510.00914","kind":"arxiv","version":3}},"canonical_sha256":"1e27da4fa3d3fe600023f537d2b8d6e5e640235c03cd53ac1372d0d0c64f0950","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1e27da4fa3d3fe600023f537d2b8d6e5e640235c03cd53ac1372d0d0c64f0950","first_computed_at":"2026-05-18T01:03:44.331736Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:03:44.331736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y6LRhzQfSDONeixIrkoX3lTbUSqNfW9KZyxwJBWO6t0te/jt/x2A0P2wyxEfFNmVy47GIFj85sQrk8PJvSx4AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:03:44.332163Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.00914","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:427d759e1f84fa237702a036df845285f819c0032902af8f9dce65c94815989b","sha256:87277647bd78ef640286851f873c8a1bb26a1855a7f41cb1df3bd9c0a4602c31"],"state_sha256":"8d348cd2c7c93e7705abc2ffa6f709b5705774126205d32237e52e882c9f454a"}