{"paper":{"title":"Fragility of stealth solutions in mimetic gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Alireza Allahyari, Clarisse Donio, Javad T. Firouzjaee, Mohammad Ali Gorji, Zahra Gorji","submitted_at":"2026-06-30T07:47:03Z","abstract_excerpt":"We study a broad class of constrained mimetic-type extensions of general relativity with action $S=\\int{\\rm d}^4x\\sqrt{-g}\\,\\bigl(R/2+\\lambda\\,C[g,\\Psi]+{\\cal L}_{\\rm m}\\bigr)$, where $R$ is the Ricci scalar, $\\lambda$ is a Lagrange multiplier, $C[g,\\Psi]$ is a scalar functional of the metric and generic field content $\\Psi$ (possibly involving $\\Psi$ and its covariant derivatives) and ${\\cal L}_{\\rm m}$ is the matter Lagrangian. The branch $\\bar\\lambda\\to 0$, with the bar denoting a background value, provides a simple screening-like limit in which the constrained sector decouples, as in cosmo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.31274","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.31274/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}