Bilimsel İlgi Alanları:
Yayınları :
Uluslararası hakemli dergilerde yayınlanan makaleler (SCI & SSCI & Arts and Humanities)
1. Keskin, D., and N. Orhan, CCSR-Modules and Weak Lifting Modules, East - West Journal of Mathematics, Volume: 5, No: 1, pp. 89-96, 2003.
2. Orhan, N., Some Characterization of Lifting Modules in terms of Preradicals, Hacettepe Journal of Mathematics and Statistics, Volume: 32, pp. 13-15, 2003.
3. Orhan, N., and D. Keskin Tütüncü, Hollow Dimension of Modules, Journal of Zhejiang University Science, Volume: 6A, No: 10, pp. 1055-1057, 2005.
4. Orhan, N., and D. Keskin Tütüncü, Generalization of Weak Lifting Modules, Soochow Journal of Mathematics, Volume: 32, No: 1, pp. 71-76, 2006.
5. Orhan, N., and D. Keskin Tütüncü, Direct Sums of Lifting Modules, East-West Journal of Mathematics, 9, 1, 53-62, 2007.
6. Keskin Tütüncü, D., Nil Orhan Ertas and Rachid Tribak, Cohereditary Modules in σ[M], Trends in Math., 265-279, 2008.
Uluslararası diğer hakemli dergilerde yayınlanan makaleler
1. Orhan, N., and D. Keskin Tütüncü, Characterizations of Lifting Modules in terms of Cojective Modules and the class of B(M,X), International Journal of Mathematics, Volume: 16, No: 6, pp. 647-660, 2005.
2. Orhan, N., D. Keskin Tütüncü, and R. Tribak, On Hollow-Lifting Modules, Taiwanese Journal of Mathematics, 11, 2, 545-568, 2007.
3. Orhan, N., D. Keskin Tütüncü, and R. Tribak, Direct Summands of Ã…-supplemented Modules, Algebra Colloquium, 14, 4, 625-630, 2007.
4. Er, N. F., and N. Orhan Ertas, Lifting Modules with Indecomposable Decompositions, Comm. Algebra, 36, no. 2, 395-404, 2008.
Uluslararası bilimsel toplantılarda sunulan ve bildiri kitabında basılan bildiriler
1. Keskin Tütüncü, D. and N. Orhan Ertas, On The Relative (Quasi-) discreteness of Modules, accepted Proceedings of the Fifth China-Japan-Korea International Symposium on Ring Theory, Tokyo, 2007.
2. Orhan, N., Cojective Modules in the Class of B(M,X), Antalya Algebra Days-VII.
3. Er, N. F., and N. Orhan Ertas, On Lifting Modules with Indecomposable Decompositions, Ohio University & Ohio State University Ring Theory Seminars.
Ulusal bilimsel toplantılarda sunulan ve bildiri kitabında basılan bildiriler
1. Orhan, N., On Gröbner Bases, METU Algebra Seminars