TY - JOUR AU - Nifa, Anass AU - Bouali, Bouchta TI - In the Self-Contact Problem in Nonlinear Elasticity PY - 2022 DA - 2022/01/31 DO - 10.1007/s00205-021-01752-2 UR - https://anassnifa.com/papers/self-contact-nonlinear-elasticity/ L1 - https://anassnifa.com/papers/self-contact-nonlinear-elasticity/manuscript.pdf LA - English JO - Archive for Rational Mechanics and Analysis VL - 243 SP - 1433 EP - 1448 KW - Nonlinear elasticity KW - self-contact KW - Sobolev mappings KW - global invertibility KW - MSC 2020: 55M25 KW - MSC 2020: 26B10 KW - MSC 2020: 74B20 KW - MSC 2020: 49S05 ER - TY - UNPB AU - Nifa, Anass TI - Dirac spectra and the topology of spaces of metrics PY - 2025 DA - 2025/11/24 DO - 10.5281/zenodo.23546912 UR - https://anassnifa.com/papers/dirac-spectra-spaces-of-metrics/ L1 - https://anassnifa.com/papers/dirac-spectra-spaces-of-metrics/manuscript.pdf LA - English M3 - Preprint N1 - v3; initial manuscript date: 24 November 2025; updated: 21 October 2026 DB - Zenodo KW - Spin Dirac operator KW - norm-resolvent approximation KW - generic simplicity KW - harmonic spinor KW - spectral prescription KW - real index difference KW - spaces of metrics KW - positive scalar curvature KW - MSC 2020: 58J50 KW - MSC 2020: 53C27 KW - MSC 2020: 58J20 KW - MSC 2020: 58D17 KW - MSC 2020: 57R65 ER - TY - UNPB AU - Nifa, Anass TI - Natural spectra and arithmetic of lens spaces PY - 2026 DA - 2026/09/02 DO - 10.5281/zenodo.23313777 UR - https://anassnifa.com/papers/natural-spectra-lens-spaces/ L1 - https://anassnifa.com/papers/natural-spectra-lens-spaces/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - Lens spaces KW - natural spectra KW - spectral rigidity KW - Casimir operators KW - congruence lattices KW - lens orbifolds KW - MSC 2020: 58J53 KW - MSC 2020: 22E46 KW - MSC 2020: 11F72 KW - MSC 2020: 11H06 ER - TY - UNPB AU - Nifa, Anass TI - Spectral identities and closed-geodesic periods PY - 2025 DA - 2025/07/01 DO - 10.5281/zenodo.23587805 UR - https://anassnifa.com/papers/spectral-identities-closed-geodesic-periods/ L1 - https://anassnifa.com/papers/spectral-identities-closed-geodesic-periods/manuscript.pdf LA - English M3 - Preprint N1 - v2; initial manuscript date: 1 July 2025; updated: 23 October 2026 DB - Zenodo KW - Isospectral manifolds KW - closed-geodesic periods KW - wave traces KW - marked spectra KW - normal homogeneous spaces KW - Casimir operators KW - central extensions KW - canonical connections KW - profinite completion KW - MSC 2020: 58J53 KW - MSC 2020: 53C22 KW - MSC 2020: 53C30 KW - MSC 2020: 22E46 KW - MSC 2020: 55P62 KW - MSC 2020: 20E18 ER - TY - UNPB AU - Nifa, Anass TI - Spectral resolution and rigidity of spherical space forms PY - 2026 DA - 2026/09/02 DO - 10.5281/zenodo.23586002 UR - https://anassnifa.com/papers/spectral-resolution-rigidity-spherical-space-forms/ L1 - https://anassnifa.com/papers/spectral-resolution-rigidity-spherical-space-forms/manuscript.pdf LA - English M3 - Preprint N1 - v2; initial manuscript date: 2 September 2026; updated: 23 October 2026 DB - Zenodo KW - Laplace spectrum KW - spherical space form KW - spectral rigidity KW - closed geodesics KW - Zoll manifold KW - Poisson relation KW - MSC 2020: 58J53 KW - MSC 2020: 53C22 KW - MSC 2020: 58E10 KW - MSC 2020: 55R20 KW - MSC 2020: 53D12 ER - TY - UNPB AU - Nifa, Anass TI - Finite spectral determination of compact homogeneous manifolds PY - 2026 DA - 2026/10/01 DO - 10.5281/zenodo.23307538 UR - https://anassnifa.com/papers/finite-spectral-determination/ L1 - https://anassnifa.com/papers/finite-spectral-determination/manuscript.pdf LA - English M3 - Preprint N1 - v2 DB - Zenodo KW - Laplace spectrum KW - homogeneous manifold KW - spectral compactness KW - semialgebraic set KW - naturally reductive metric KW - spectral rigidity KW - MSC 2020: 58J53 KW - MSC 2020: 53C30 KW - MSC 2020: 22E46 KW - MSC 2020: 14P10 KW - MSC 2020: 58J50 ER - TY - UNPB AU - Nifa, Anass TI - Sharp defect bounds for regular-matroid Jacobians PY - 2026 DA - 2026/10/07 DO - 10.5281/zenodo.23548043 UR - https://anassnifa.com/papers/sharp-defect-bounds/ L1 - https://anassnifa.com/papers/sharp-defect-bounds/manuscript.pdf LA - English M3 - Preprint N1 - v2; initial manuscript date: 7 October 2026; updated: 22 October 2026 DB - Zenodo KW - Regular matroid KW - Jacobian KW - exponent KW - integral lattice KW - root system KW - finiteness KW - MSC 2020: 05B35 KW - MSC 2020: 05C25 KW - MSC 2020: 11H56 ER - TY - UNPB AU - Nifa, Anass TI - Sharp Schrödinger inequalities for embedded hypersurfaces PY - 2026 DA - 2026/09/08 DO - 10.5281/zenodo.23605781 UR - https://anassnifa.com/papers/sharp-schrodinger-inequalities-embedded-hypersurfaces/ L1 - https://anassnifa.com/papers/sharp-schrodinger-inequalities-embedded-hypersurfaces/manuscript.pdf LA - English M3 - Preprint N1 - v2; initial manuscript date: 8 September 2026; updated: 24 October 2026 DB - Zenodo KW - Minimal hypersurface KW - self-shrinker KW - contact curvature KW - Schrödinger operator KW - Gaussian density KW - rigidity KW - MSC 2020: 53C42 KW - MSC 2020: 58J50 KW - MSC 2020: 53E10 KW - MSC 2020: 35J10 ER - TY - UNPB AU - Nifa, Anass TI - Volume asymptotics and Einstein moduli on spheres PY - 2026 DA - 2026/10/19 DO - 10.5281/zenodo.23484018 UR - https://anassnifa.com/papers/einstein-conical-limits/ L1 - https://anassnifa.com/papers/einstein-conical-limits/manuscript.pdf LA - English M3 - Preprint N1 - v2; initial manuscript date: 18 September 2026; version 2 posted: 19 October 2026 DB - Zenodo KW - Einstein metric KW - Einstein moduli KW - normalized volume KW - sine-cone KW - cohomogeneity one KW - MSC 2020: 53C25 KW - MSC 2020: 58D27 ER - TY - UNPB AU - Nifa, Anass TI - Uniqueness, Morse index, and nullity of Carlotto–Schulz minimal hypersurfaces PY - 2026 DA - 2026/09/09 DO - 10.5281/zenodo.22914243 UR - https://anassnifa.com/papers/carlotto-schulz-minimal-hypersurfaces/ L1 - https://anassnifa.com/papers/carlotto-schulz-minimal-hypersurfaces/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - Minimal hypersurface KW - Morse index KW - Jacobi operator KW - first eigenvalue KW - shooting method KW - interval arithmetic KW - MSC 2020: 53C42 KW - MSC 2020: 58J50 KW - MSC 2020: 34B24 KW - MSC 2020: 65G20 KW - MSC 2020: 58E12 ER - TY - UNPB AU - Nifa, Anass TI - Knotted tori in the four-sphere with diffeomorphic exteriors PY - 2026 DA - 2026/09/06 DO - 10.5281/zenodo.22963510 UR - https://anassnifa.com/papers/knotted-tori-diffeomorphic-exteriors/ L1 - https://anassnifa.com/papers/knotted-tori-diffeomorphic-exteriors/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - knotted torus KW - smooth exterior KW - torus surgery KW - circle action KW - peripheral structure KW - commutator length KW - MSC 2020: 57K45 KW - MSC 2020: 57R65 KW - MSC 2020: 20F67 KW - MSC 2020: 57K31 ER - TY - UNPB AU - Nifa, Anass TI - Einstein link spectra and the Morse index of Ricci-flat cones PY - 2026 DA - 2026/09/03 DO - 10.5281/zenodo.22914003 UR - https://anassnifa.com/papers/einstein-link-spectra/ L1 - https://anassnifa.com/papers/einstein-link-spectra/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - Einstein metric KW - Ricci-flat cone KW - Lichnerowicz operator KW - Morse index KW - finite quotient KW - conformally Kähler metric KW - inverse-square potential KW - MSC 2020: 53C25 KW - MSC 2020: 58J50 KW - MSC 2020: 35P20 KW - MSC 2020: 53C55 KW - MSC 2020: 53E20 ER - TY - UNPB AU - Nifa, Anass TI - Instability of Einstein warped products and a one-sided Weyl curvature gap PY - 2026 DA - 2026/09/01 DO - 10.5281/zenodo.22851382 UR - https://anassnifa.com/papers/einstein-instability-weyl-gap/ L1 - https://anassnifa.com/papers/einstein-instability-weyl-gap/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - Einstein metric KW - warped product KW - transverse-traceless tensor KW - Weyl curvature KW - integral pinching KW - orbifold degeneration KW - MSC 2020: 53C25 KW - MSC 2020: 58J50 KW - MSC 2020: 53C23 ER - TY - UNPB AU - Nifa, Anass TI - Scalar and tensor eigenvalue bounds for conformally Kähler Einstein four-manifolds PY - 2026 DA - 2026/09/01 DO - 10.5281/zenodo.22851442 UR - https://anassnifa.com/papers/scalar-tensor-eigenvalues/ L1 - https://anassnifa.com/papers/scalar-tensor-eigenvalues/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - Einstein metric KW - scalar Laplacian KW - Lichnerowicz Laplacian KW - conformal instability KW - toric Kähler metric KW - Ricci-flat cone KW - MSC 2020: 53C25 KW - MSC 2020: 58J50 KW - MSC 2020: 53C55 KW - MSC 2020: 53E20 ER - TY - UNPB AU - Nifa, Anass TI - The optimal eigenvalue count in Aubry's spectral sphere theorem for dimensions at least four PY - 2026 DA - 2026/09/01 DO - 10.5281/zenodo.22949597 UR - https://anassnifa.com/papers/optimal-eigenvalue-count/ L1 - https://anassnifa.com/papers/optimal-eigenvalue-count/manuscript.pdf LA - English M3 - Preprint N1 - v2 DB - Zenodo KW - Spectral geometry KW - Ricci curvature KW - MSC 2020: 58J50 KW - MSC 2020: 53C20 KW - MSC 2020: 53C21 KW - MSC 2020: 53C23 ER - TY - UNPB AU - Nifa, Anass TI - Negative Lichnerowicz modes on Einstein warped products and spheres PY - 2026 DA - 2026/08/31 DO - 10.5281/zenodo.22681024 UR - https://anassnifa.com/papers/negative-lichnerowicz-modes/ L1 - https://anassnifa.com/papers/negative-lichnerowicz-modes/manuscript.pdf LA - English M3 - Preprint N1 - v1; initial manuscript date: 31 August 2026; manuscript revision: 2 September 2026 DB - Zenodo KW - Einstein metrics KW - Spectral geometry KW - MSC 2020: 53C25 KW - MSC 2020: 58J50 ER - TY - UNPB AU - Nifa, Anass TI - Homological obstructions to local contractibility in noncollapsed Ricci limits PY - 2026 DA - 2026/08/25 DO - 10.5281/zenodo.23049905 UR - https://anassnifa.com/papers/local-contractibility-ricci-limits/ L1 - https://anassnifa.com/papers/local-contractibility-ricci-limits/manuscript.pdf LA - English M3 - Preprint N1 - v3 DB - Zenodo KW - Ricci curvature KW - Local contractibility KW - MSC 2020: 53C23 KW - MSC 2020: 53C21 KW - MSC 2020: 55N10 ER - TY - UNPB AU - Nifa, Anass TI - Realization and rigidity of finite discriminant pairings PY - 2026 DA - 2026/09/06 DO - 10.5281/zenodo.23224615 UR - https://anassnifa.com/papers/prime-order-graph-jacobians/ L1 - https://anassnifa.com/papers/prime-order-graph-jacobians/manuscript.pdf LA - English M3 - Preprint N1 - v2 DB - Zenodo KW - Discriminant pairing KW - integral lattice KW - graph Jacobian KW - monodromy KW - prime complement KW - locally flat embedding KW - MSC 2020: 11E08 KW - MSC 2020: 11E12 KW - MSC 2020: 05C50 KW - MSC 2020: 14H40 KW - MSC 2020: 11G20 KW - MSC 2020: 57N35 ER - TY - UNPB AU - Nifa, Anass TI - Topological singularities in the codimension-two stratum of noncollapsed Ricci limits PY - 2026 DA - 2026/07/31 DO - 10.5281/zenodo.23049912 UR - https://anassnifa.com/papers/codimension-two-singularities/ L1 - https://anassnifa.com/papers/codimension-two-singularities/manuscript.pdf LA - English M3 - Preprint N1 - v2 DB - Zenodo KW - Ricci curvature KW - Topological singularities KW - MSC 2020: 53C23 KW - MSC 2020: 53C21 KW - MSC 2020: 57P05 KW - MSC 2020: 55N10 ER - TY - UNPB AU - Nifa, Anass TI - Operational and free-energy convergence do not determine kinetic geometry in logarithmic quantum transport PY - 2026 DA - 2026/06/10 DO - 10.5281/zenodo.22699067 UR - https://anassnifa.com/papers/kinetic-geometry-quantum-transport/ L1 - https://anassnifa.com/papers/kinetic-geometry-quantum-transport/manuscript.pdf LA - English M3 - Preprint N1 - v1; initial manuscript date: 10 June 2026; manuscript revision: 5 August 2026 DB - Zenodo KW - Quantum optimal transport KW - Metric geometry KW - MSC 2020: 49Q22 KW - MSC 2020: 46L57 KW - MSC 2020: 47D07 KW - MSC 2020: 49J45 KW - MSC 2020: 81P17 ER - TY - UNPB AU - Nifa, Anass TI - Integral invariants of reduced plumbing graphs PY - 2026 DA - 2026/06/06 DO - 10.5281/zenodo.22674090 UR - https://anassnifa.com/papers/integral-plumbing-invariants/ L1 - https://anassnifa.com/papers/integral-plumbing-invariants/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - Plumbing graphs KW - Differential topology KW - MSC 2020: 57R19 KW - MSC 2020: 57R20 KW - MSC 2020: 11E76 KW - MSC 2020: 05B35 KW - MSC 2020: 53C21 ER - TY - UNPB AU - Nifa, Anass TI - Fundamental-group epimorphisms in noncollapsed Ricci limits PY - 2026 DA - 2026/05/25 DO - 10.5281/zenodo.22770177 UR - https://anassnifa.com/papers/fundamental-group-kernels/ L1 - https://anassnifa.com/papers/fundamental-group-kernels/manuscript.pdf LA - English M3 - Preprint N1 - v2 DB - Zenodo KW - Fundamental groups KW - Ricci curvature KW - MSC 2020: 53C21 KW - MSC 2020: 53C23 KW - MSC 2020: 57M10 KW - MSC 2020: 57R65 KW - MSC 2020: 20E06 ER - TY - UNPB AU - Nifa, Anass TI - Finiteness thresholds and surface bounds for graph Jacobians PY - 2026 DA - 2026/09/29 DO - 10.5281/zenodo.23622186 UR - https://anassnifa.com/papers/homocyclic-jacobians/ L1 - https://anassnifa.com/papers/homocyclic-jacobians/manuscript.pdf LA - English M3 - Preprint N1 - v3; initial manuscript date: 29 September 2026; updated: 24 October 2026 DB - Zenodo KW - Graph Jacobian KW - exponent KW - biconnected graph KW - integral potential KW - monodromy pairing KW - planar graph KW - toroidal embedding KW - MSC 2020: 05C25 KW - MSC 2020: 05C50 KW - MSC 2020: 05C10 KW - MSC 2020: 05C40 KW - MSC 2020: 20K01 ER - TY - UNPB AU - Nifa, Anass TI - Local realization of spectral clusters PY - 2026 DA - 2026/09/30 DO - 10.5281/zenodo.23224622 UR - https://anassnifa.com/papers/local-spectral-sections/ L1 - https://anassnifa.com/papers/local-spectral-sections/manuscript.pdf LA - English M3 - Preprint N1 - v2 DB - Zenodo KW - spectral cluster KW - Laplace operator KW - Schrödinger operator KW - local realization KW - multiplicity KW - holonomy KW - spectral rigidity KW - MSC 2020: 58J50 KW - MSC 2020: 35P05 KW - MSC 2020: 35S05 KW - MSC 2020: 58C40 KW - MSC 2020: 53C29 KW - MSC 2020: 57R22 ER - TY - UNPB AU - Nifa, Anass TI - Prescribed Steklov spectra and multiplicities on surfaces PY - 2026 DA - 2026/09/04 DO - 10.5281/zenodo.22949635 UR - https://anassnifa.com/papers/prescribed-steklov-spectra/ L1 - https://anassnifa.com/papers/prescribed-steklov-spectra/manuscript.pdf LA - English M3 - Preprint N1 - v1 DB - Zenodo KW - Steklov eigenvalue KW - spectral prescription KW - eigenvalue multiplicity KW - surface with boundary KW - graph Laplacian KW - homogenisation KW - MSC 2020: 58J50 KW - MSC 2020: 35P05 KW - MSC 2020: 35J25 KW - MSC 2020: 53A05 KW - MSC 2020: 05C50 ER - TY - UNPB AU - Nifa, Anass TI - Small regions, persistent homology: an illustrated companion to the construction PY - 2026 DA - 2026/09/29 UR - https://anassnifa.com/papers/small-regions-persistent-homology-companion/ L1 - https://anassnifa.com/papers/small-regions-persistent-homology-companion/manuscript.pdf LA - English M3 - Illustrated companion N1 - v1 KW - noncollapsed Ricci limits KW - local contractibility KW - neighborhood homology KW - Ricci curvature KW - tangent cones KW - illustrated companion ER - TY - UNPB AU - Nifa, Anass TI - Two links at one point: an illustrated companion to the construction PY - 2026 DA - 2026/09/29 UR - https://anassnifa.com/papers/two-links-at-one-point-companion/ L1 - https://anassnifa.com/papers/two-links-at-one-point-companion/manuscript.pdf LA - English M3 - Illustrated companion N1 - v1 KW - noncollapsed Ricci limits KW - topological singularities KW - codimension two KW - tangent cones KW - Ricci curvature KW - smooth fillings KW - illustrated companion ER -