Turgut Önder's homepage

Title Professor

Research fields Algebraic and differential topology

Research interests Topological K-theory, vector fields and frame fields, finite group actions, Seiberg-Witten theory

Education
BS, Middle East Technical University, 1973
MS, Middle East Technical University, 1975
PhD, Univ. of California, Berkeley, 1979

Selected Publications

• Orders of elements of equivariant J-groups of complex projective spaces

 Indag. Math., N.S.,13(2) (2002), 229--247
• Equivariant cross sections of complex Stiefel manifolds

Topology Appl., 109 (2001), 107--125
• Equivariant frame fields on spheres with complementary equivariant complex structures

Manuscripta Math., 86 (1995), 393--407
• An alternative computation of 2-primary factors of J-orders of Hopf line bundles

Bull. Istanbul Tech. Univ., 47 (1994), no. 4, 265--274
• Some equivariant specialized structures on the complements of G-fields over the spheres

Proceedings of 23rd Conference on Geometry and Topology (Cluj-Napoca, 1993), 102--107, Babeþ Bolyai Univ., Cluj-Napoca, 1994
• Homotopy groups of some homogeneous spaces and some remarks on their sections over spheres (with M. Abdelal)

Rend. Circ. Mat. Palermo (2), 39 (1990), 381--354
• Some specialized structures on the subbundles of the tangent bundle of sphere

Festschrift for Professor Mahadev Dutta (Calcutta, 1985--1986), Bull. Cal. Math. Soc., (1987), 35--40
• Sections of U(2n)/Sp(s) over S^4n-1

Indag. Math (= Nederl. Akad. Wetensch. Proc. Ser. A), 48 (1986), 455--461
• Nonexistence of almost-quaternion substructures on the complex projective space

Canad. Math. Bull., 28 (1985), no. 2, 231--232
• Almost-quaternion (m-1)-substructures on S^4m-3

Proc. Amer. Math. Soc., 90 (1984), 155--156
• Almost-quaternion substructures on the canonical C^n-1-bundle over S^2n-1

J. London Math.Soc., Series 2, 28 (1983), 435--442
• On quaternionic James numbers and almost-quaternion substructures on the sphere

Proc. Amer. Math. Soc., 86 (1982), no. 3, 535--540

Books edited

• Gökova Geometry / Topology Conference Proceedings (1993, 94, 95, 96, 98, 00, 01), published by International Press.

• Gökova Geometry/Topology Conferences
• Geometry / Topology Seminar group in METU

e-mail: onder@metu.edu.tr

Address:
Middle East Technical University
Department of Mathematics
06531 Ankara
Turkey