Dr Haluk Sengun
School of Mathematical and Physical Sciences
Senior Lecturer of Pure Mathematics
Member of One University Committee
 
   
  Full contact details
School of Mathematical and Physical Sciences
J06a
Hicks Building
Hounsfield Road
Sheffield
S3 7RH
- Profile
- 
    I got my BSc from Istanbul Bilgi University and my PhD from the University of Wisconsin 
 at Madison. I held post-doctoral positions at Barcelona, Bonn, Essen and Warwick.
- Research interests
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    I am interested in the cohomology and K-theory of arithmetic groups, automorphic forms, abelian varieties, Galois representations and the mostly conjectural connections between them as envisioned by the Langlands Programme. I especially study the above objects in the setting where the relevant arithmetic groups live in the Lie group PSL(2,C) (such as "Bianchi groups"). I enjoy developing computer programs and carrying out numerical experiments to explore and gain insight. 
 
- Publications
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    Show: Featured publications All publications Featured publicationsJournal articles-  Equal rank local theta correspondence as a strong Morita equivalence. Selecta Mathematica, 30(4). View this article in WRRO 
					    
-  On the asymptotic Fermat’s last theorem over number fields. Commentarii Mathematici Helvetici, 93(2), 359-375. 
					    
-  On the asymptotic Fermat's Last Theorem over number fields. Commentarii Mathematici Helvetici. 
					    
-  Torsion homology growth and cycle complexity of arithmetic manifolds. Duke Mathematical Journal, 165(9), 1629-1693. 
					    
 All publicationsEdited booksJournal articles-  Preface, ix-x. 
					    
-  Equal rank local theta correspondence as a strong Morita equivalence. Selecta Mathematica, 30(4). View this article in WRRO 
					    
-  Appendix; Torsion in the homology of principal congruence subgroups of Bianchi groups. Annales de l'Institut Fourier, 73(1), 329-333. View this article in WRRO 
					    
-  Hecke operators in KK-theory and the K-homology of Bianchi groups. Journal of Noncommutative Geometry, 14(1), 125-189. 
					    
-  Torsion homology growth for noncongruence subgroups of Bianchi groups. International Journal of Number Theory, 16(04), 787-802. View this article in WRRO 
					    
-  Hecke modules for arithmetic groups via bivariant K -theory. Annals of K-Theory, 3(4), 631-656. View this article in WRRO 
					    
-  Mod p Base Change transfer for GL(2). Journal of the Ramanujan Mathematical Society, 33(3), 297-334. 
					    
-  On the asymptotic Fermat’s last theorem over number fields. Commentarii Mathematici Helvetici, 93(2), 359-375. 
					    
-  On the asymptotic Fermat's Last Theorem over number fields. Commentarii Mathematici Helvetici. 
					    
-  Lower Bounds on the Dimension of the Cohomology of Bianchi Groups via Sczech Cocyles. JOURNAL DE THEORIE DES NOMBRES DE BORDEAUX, 28(1), 237-260. View this article in WRRO 
					    
-  Torsion homology growth and cycle complexity of arithmetic manifolds. Duke Mathematical Journal, 165(9), 1629-1693. 
					    
-  Uniformization of modular elliptic curves via p-adic periods. Journal of Algebra, 445, 458-502. View this article in WRRO 
					    
-  Theta lifts of Bianchi modular forms and applications to paramodularity. Journal of the London Mathematical Society, 2(92), 353-370. View this article in WRRO 
					    
-  Darmon points on elliptic curves over number fields of arbitrary signature. Proceedings of the London Mathematical Society, 111(2), 484-518. View this article in WRRO 
					    
-  Arithmetic Aspects of Bianchi Groups, 279-315. 
					    
-  On Level One Cuspidal Bianchi Modular Forms. LMS Journal of Computation and Mathematics, 16, 187-199. View this article in WRRO 
					    
-  On level one cuspidal Bianchi modular forms.. LMS J. Comput. Math., 16, 187-199. 
					    
-  On The Torsion Homology of Non-Arithmetic Hyperbolic Tetrahedral Groups. Int. Jour. Number Theory., 08(2), 311-320. 
					    
-  On the Integral Cohomology of Bianchi groups. Experimental Mathematics, 20(4), 487-505. View this article in WRRO 
					    
-  The nonexistence of certain representations of the absolute galois group of quadratic fields. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 137(1), 27-35. 
					    
-  The Nonexistence of Certain Representations of the Absolute Galois Group of Quadratic Fields. Proceedings of the American Mathematical Society, 137, 27-35. View this article in WRRO 
					    
-  Weight Reduction for Mod l Bianchi Modular Forms. Journal of Number Theory, 129(8), 2010-2019. View this article in WRRO 
					    
 Book chapters-  Arithmetic aspects of Bianchi groups, Computations with Modular Forms Proceedings of a Summer School and Conference, Heidelberg, August/September 2011 (pp. 279-315). Springer 
					    
-  Group C*-algebras, C*-correspondences and K-theory In Sengun M & Plymen R (Ed.), K-Theory and Representation Theory Cambridge University Press 
					    
 Conference proceedings-  A K-theoretic Selberg trace formula. Operator Theory, Operator Algebras and Their Interactions with Geometry and Topology, Vol. 278 (pp 403-424). Shanghai, China, 23 July 2018 - 27 July 2018. 
					    
 Preprints-  Theta correspondence via group C*-algebras, arXiv. 
					    
-  Hecke modules for arithmetic groups via bivariant K-theory, arXiv. 
					    
-  Mod p Base Change transfer for GL(2), arXiv. 
					    
-  Hecke operators in KK-theory and the K-homology of Bianchi groups, arXiv. 
					    
-  On the asymptotic Fermat's Last Theorem over number fields, arXiv. 
					    
-  Uniformization of modular elliptic curves via p-adic periods, arXiv. 
					    
-  Darmon points on elliptic curves over number fields of arbitrary signature, arXiv. 
					    
-  Theta Lifts of Bianchi Modular Forms and Applications to Paramodularity, arXiv. 
					    
-  An Introduction to A-polynomials and their Mahler Measures, arXiv. 
					    
-  Torsion homology growth and cycle complexity of arithmetic manifolds, arXiv. 
					    
-  The Nonexistence of Certain Representations of the Absolute Galois Group of Quadratic Fields, arXiv. 
					    
-  Arithmetic Aspects of Bianchi Groups, arXiv. 
					    
-  On the Dimension of Cohomology of Bianchi Groups, arXiv. 
					    
-  Some Applications of Number Theory to 3-Manifold Theory, arXiv. 
					    
-  On Level One Cuspidal Bianchi Modular Forms, arXiv. 
					    
-  On The Torsion Homology of Non-Arithmetic Hyperbolic Tetrahedral Groups, arXiv. 
					    
-  On the Integral Cohomology of Bianchi groups, arXiv. 
					    
-  Weight Reduction for Mod l Bianchi Modular Forms, arXiv. 
					    
 
-  Equal rank local theta correspondence as a strong Morita equivalence. Selecta Mathematica, 30(4). View this article in WRRO 
					
- Research group
- Grants
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    Current GrantA torsion Jacquet-Langlands Transfer via K-theory EPSRC 
- Teaching activities
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    MAS220 Algebra MAS430 Analytic Number Theory