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When $k = n$, the specialization $\\Delta'_{e_{n-1}} e_n|_{t = 0}$ is the Frobenius image of the graded $S_n$-module afforded by the cohomology ring of the {\\em flag variety} consisting of complete flags in $\\mathbb{C}^n$. We define and study a variety $X_{n,k}$ which carries an action of $S_n$ whose cohomology ring $H^{\\bullet}(X_{n,k})$ has Frobenius image given by $\\D"},"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":"1711.08301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.CO","submitted_at":"2017-11-22T14:47:19Z","cross_cats_sorted":[],"title_canon_sha256":"5f924e9311ff74cb29565bc701b7adb1ca9a77355f15cadfdfb5b79b071b9383","abstract_canon_sha256":"5daff5f024bd56e13ea47cb9529c055ee080ec1c0173319a99d21ae098fab4f8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:29:50.145640Z","signature_b64":"kEaMX6GHB6uM+EbJFd2NR6r66ScsxYM3MbUqiPWHqjnY0vyQZs2veYB6gy4AYCJ/ro4ALWxEnEV6luZ2n85GDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bee3a314dc850ba11d90254e288e7d9e7b164b69370532b79ce2861d8358863f","last_reissued_at":"2026-05-18T00:29:50.145074Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:29:50.145074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A flag variety for the Delta Conjecture","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.CO","authors_text":"Brendan Pawlowski, Brendon Rhoades","submitted_at":"2017-11-22T14:47:19Z","abstract_excerpt":"The Delta Conjecture of Haglund, Remmel, and Wilson predicts the monomial expansion of the symmetric function $\\Delta'_{e_{k-1}} e_n$, where $k \\leq n$ are positive integers and $\\Delta'_{e_{k-1}}$ is a Macdonald eigenoperator. 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