{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:7KGUHJ6UOP7BWTLN6L7S5M3QKG","short_pith_number":"pith:7KGUHJ6U","canonical_record":{"source":{"id":"1307.1749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-06T05:08:02Z","cross_cats_sorted":[],"title_canon_sha256":"e8af32f4e0ff00ea620ef225fbcfbd690a8607103db6765208aaa09621b22dc8","abstract_canon_sha256":"0d960ca1d3bc4263ed5cdde5d996da2b8be0bb6a5fb321c704039ed190bd019d"},"schema_version":"1.0"},"canonical_sha256":"fa8d43a7d473fe1b4d6df2ff2eb37051a4dc52db599695b93d11176edce5ba36","source":{"kind":"arxiv","id":"1307.1749","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1749","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1749v1","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1749","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"pith_short_12","alias_value":"7KGUHJ6UOP7B","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7KGUHJ6UOP7BWTLN","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7KGUHJ6U","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:7KGUHJ6UOP7BWTLN6L7S5M3QKG","target":"record","payload":{"canonical_record":{"source":{"id":"1307.1749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-06T05:08:02Z","cross_cats_sorted":[],"title_canon_sha256":"e8af32f4e0ff00ea620ef225fbcfbd690a8607103db6765208aaa09621b22dc8","abstract_canon_sha256":"0d960ca1d3bc4263ed5cdde5d996da2b8be0bb6a5fb321c704039ed190bd019d"},"schema_version":"1.0"},"canonical_sha256":"fa8d43a7d473fe1b4d6df2ff2eb37051a4dc52db599695b93d11176edce5ba36","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:59.163018Z","signature_b64":"YFEqXQChtH1ObXur6qkDC2kyi/RIVRad6hwUJB9JtI+ixMy931Y0uiEBXUhnBy7mqtZLIDInSXZxv4J4/s8TDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa8d43a7d473fe1b4d6df2ff2eb37051a4dc52db599695b93d11176edce5ba36","last_reissued_at":"2026-05-18T01:48:59.162394Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:59.162394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.1749","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":"2026-05-18T01:48:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9uQo39jcS9VDU/NI+OOOI0BCfTBe/OfjuTqOfCna2aQHEoEAC1LuGN27IsinaY7sF7y2+ezA7cXBRIlKmWSIDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T07:57:42.503950Z"},"content_sha256":"8209bdf672b308298b9c55d24eb2eaf6ccf48fbae731d1350c90d484dd6bc574","schema_version":"1.0","event_id":"sha256:8209bdf672b308298b9c55d24eb2eaf6ccf48fbae731d1350c90d484dd6bc574"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:7KGUHJ6UOP7BWTLN6L7S5M3QKG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-loop vacuum energy for Calabi-Yau orbifold models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Duong H. Phong, Eric D'Hoker","submitted_at":"2013-07-06T05:08:02Z","abstract_excerpt":"A precise evaluation of the two-loop vacuum energy is provided for certain Z_2 x Z_2 Calabi-Yau orbifold models in the Heterotic string. The evaluation is based on the recent general prescription for superstring perturbation theory in terms of integration over cycles in supermoduli space, implemented at two-loops with the gauge-fixing methods based on the natural projection of supermoduli space onto moduli space using the super-period matrix. It is shown that the contribution from the interior of supermoduli space (computed with the procedure that has been used in previous two-loop computation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1749","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":"2026-05-18T01:48:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LKSUqh0mKNyj0NOrp7SnrsjMCxy0vFCld0LldLZ7mHG+6pUaHyng2PlH9GNz4kjCB1nt/wfONp8tNVUpQQhyDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T07:57:42.504325Z"},"content_sha256":"bed91dd49a48ef9a99043f8670369fc74d5e5fdef796ccf815b841a03a707184","schema_version":"1.0","event_id":"sha256:bed91dd49a48ef9a99043f8670369fc74d5e5fdef796ccf815b841a03a707184"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7KGUHJ6UOP7BWTLN6L7S5M3QKG/bundle.json","state_url":"https://pith.science/pith/7KGUHJ6UOP7BWTLN6L7S5M3QKG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7KGUHJ6UOP7BWTLN6L7S5M3QKG/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":"2026-05-28T07:57:42Z","links":{"resolver":"https://pith.science/pith/7KGUHJ6UOP7BWTLN6L7S5M3QKG","bundle":"https://pith.science/pith/7KGUHJ6UOP7BWTLN6L7S5M3QKG/bundle.json","state":"https://pith.science/pith/7KGUHJ6UOP7BWTLN6L7S5M3QKG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7KGUHJ6UOP7BWTLN6L7S5M3QKG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7KGUHJ6UOP7BWTLN6L7S5M3QKG","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":"0d960ca1d3bc4263ed5cdde5d996da2b8be0bb6a5fb321c704039ed190bd019d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-06T05:08:02Z","title_canon_sha256":"e8af32f4e0ff00ea620ef225fbcfbd690a8607103db6765208aaa09621b22dc8"},"schema_version":"1.0","source":{"id":"1307.1749","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1749","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1749v1","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1749","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"pith_short_12","alias_value":"7KGUHJ6UOP7B","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7KGUHJ6UOP7BWTLN","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7KGUHJ6U","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:bed91dd49a48ef9a99043f8670369fc74d5e5fdef796ccf815b841a03a707184","target":"graph","created_at":"2026-05-18T01:48:59Z","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":"A precise evaluation of the two-loop vacuum energy is provided for certain Z_2 x Z_2 Calabi-Yau orbifold models in the Heterotic string. The evaluation is based on the recent general prescription for superstring perturbation theory in terms of integration over cycles in supermoduli space, implemented at two-loops with the gauge-fixing methods based on the natural projection of supermoduli space onto moduli space using the super-period matrix. It is shown that the contribution from the interior of supermoduli space (computed with the procedure that has been used in previous two-loop computation","authors_text":"Duong H. Phong, Eric D'Hoker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-06T05:08:02Z","title":"Two-loop vacuum energy for Calabi-Yau orbifold models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1749","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":"sha256:8209bdf672b308298b9c55d24eb2eaf6ccf48fbae731d1350c90d484dd6bc574","target":"record","created_at":"2026-05-18T01:48:59Z","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":"0d960ca1d3bc4263ed5cdde5d996da2b8be0bb6a5fb321c704039ed190bd019d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-06T05:08:02Z","title_canon_sha256":"e8af32f4e0ff00ea620ef225fbcfbd690a8607103db6765208aaa09621b22dc8"},"schema_version":"1.0","source":{"id":"1307.1749","kind":"arxiv","version":1}},"canonical_sha256":"fa8d43a7d473fe1b4d6df2ff2eb37051a4dc52db599695b93d11176edce5ba36","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa8d43a7d473fe1b4d6df2ff2eb37051a4dc52db599695b93d11176edce5ba36","first_computed_at":"2026-05-18T01:48:59.162394Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:59.162394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YFEqXQChtH1ObXur6qkDC2kyi/RIVRad6hwUJB9JtI+ixMy931Y0uiEBXUhnBy7mqtZLIDInSXZxv4J4/s8TDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:59.163018Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.1749","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8209bdf672b308298b9c55d24eb2eaf6ccf48fbae731d1350c90d484dd6bc574","sha256:bed91dd49a48ef9a99043f8670369fc74d5e5fdef796ccf815b841a03a707184"],"state_sha256":"b99fa5a5d6d8fabb95701685dba56f61790a1df331c179ecc548cb945d2db15f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3Ehznu56Qi0gP6/pupuZD9Jpm99YVkD3N6RNNFMJzMyFQianRvzc1ev5P/bMuSRSUQAqPhD+3gmYuP3YXI2pAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T07:57:42.506343Z","bundle_sha256":"61821792ae7a327406c322d9c3b375a559dd9394a90ba1bafc3ed9c1c0786f5c"}}