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Since then these Weyl anomalies have found a variety of applications in black hole physics, cosmology, string theory and statistical mechanics. We give a nostalgic review. (Talk given at the {\\it Salamfest}, ICTP, Trieste, March 1993.)"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"hep-th/9308075","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1993-08-16T16:12:03Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"3fecc9b7715f43018ec3f350e0db28ad98fc4ce160b35062d9c07a6ced37ecec","abstract_canon_sha256":"e4ca034c51f836d35fde81aca52e4858b93491f4784751d377fce1fc15857228"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:25:40.577235Z","signature_b64":"wyhJyMLncZdkuu3xT5y5ax+FBZRiisPhYgmrM6Gvmwn7Xlxd5GNLQDXBm+Dp12u1Wz/5ZDJnpnNLn0tHaq2fDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f9c2985fbab4f758974229b50bf2ac05a859c5d67606f53df70fc98ee5f1f9a5","last_reissued_at":"2026-07-04T17:25:40.576824Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:25:40.576824Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Twenty Years of the Weyl Anomaly","license":"","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"M. 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