{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:TJEIB67U253IDCJ4TRQX55RFOR","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":"363b9184bd292c87bd15550b4cdc5767416f8c8cf2052e298b113c047180631a","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2019-08-13T18:03:00Z","title_canon_sha256":"d69aa5db45728ab7b3f3a6c7baaf95f974ea076a2d7f8b32b9a4fb888fc0fa69"},"schema_version":"1.0","source":{"id":"1908.04805","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.04805","created_at":"2026-07-05T00:51:29Z"},{"alias_kind":"arxiv_version","alias_value":"1908.04805v1","created_at":"2026-07-05T00:51:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.04805","created_at":"2026-07-05T00:51:29Z"},{"alias_kind":"pith_short_12","alias_value":"TJEIB67U253I","created_at":"2026-07-05T00:51:29Z"},{"alias_kind":"pith_short_16","alias_value":"TJEIB67U253IDCJ4","created_at":"2026-07-05T00:51:29Z"},{"alias_kind":"pith_short_8","alias_value":"TJEIB67U","created_at":"2026-07-05T00:51:29Z"}],"graph_snapshots":[{"event_id":"sha256:2ce5a72fd54df51e9657ab06f1672865be26b20351badf6314ac65554d49c63d","target":"graph","created_at":"2026-07-05T00:51:29Z","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/1908.04805/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We point out that the choice of phases in GSO projections can be accounted for by a choice of fermionic SPT phases on the worldsheet of the string. This point of view not only easily explains why there are essentially two type II theories, but also predicts that there are unoriented type 0 theories labeled by n mod 8, and that there is an essentially unique choice of the type I worldsheet theory. We also discuss the relationship between this point of view and the K-theoretic classification of D-branes.","authors_text":"Julio Parra-Martinez, Justin Kaidi, Yuji Tachikawa","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2019-08-13T18:03:00Z","title":"GSO projections via SPT phases"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.04805","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:eebf862b4c5dca46442446cfb80dfd1a62606b958421ba1b0dd69f5674b7a142","target":"record","created_at":"2026-07-05T00:51:29Z","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":"363b9184bd292c87bd15550b4cdc5767416f8c8cf2052e298b113c047180631a","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2019-08-13T18:03:00Z","title_canon_sha256":"d69aa5db45728ab7b3f3a6c7baaf95f974ea076a2d7f8b32b9a4fb888fc0fa69"},"schema_version":"1.0","source":{"id":"1908.04805","kind":"arxiv","version":1}},"canonical_sha256":"9a4880fbf4d77681893c9c617ef62574636e5fc79ba9d97dd1e46ed44f210374","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a4880fbf4d77681893c9c617ef62574636e5fc79ba9d97dd1e46ed44f210374","first_computed_at":"2026-07-05T00:51:29.882529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:51:29.882529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WZ4jF1zC+E4/z+FpHgb5WMAz7l/OHANB0bPR6y55iDhRK8rgQw+JUiN4pc1KdkXdl6sPjt/bSV2P2fqSKalkAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:51:29.882969Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.04805","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eebf862b4c5dca46442446cfb80dfd1a62606b958421ba1b0dd69f5674b7a142","sha256:2ce5a72fd54df51e9657ab06f1672865be26b20351badf6314ac65554d49c63d"],"state_sha256":"7fb8c30daf012f7d0dd292db02b101e1dcba595fac1566e7591b3cf5f5681826"}