Recent papers


Shigeo Koshitani, Ipek Tuvay: The Brauer indecomposability of Scott modules for the quadratic group Qd(p) , Preprint

Shigeo Koshitani, Caroline Lassueur: Simple modules in the Auslander-Reiten quivers of principal blocks with abelian defect groups , Nagoya Mathematical Journal, To appear.

Shigeo Koshitani, Juergen Mueller: The projective cover of the trivial representation for finite group of Lie type in defining characteristic , Journal of Algebra and Colloquium 24 (2017), 439--452.

Shigeo Koshitani, Britta Spaeth: The inductive Aperin-McKay and blockwise Alperin weight conditions for blocks with cyclic defect groups , Journal of Group Theory 19 (2016), 771--813.

Shigeo Koshitani, Britta Spaeth: The inductive Alperin-McKay condition for 2-blocks with cyclic defect groups , Archiv der Mathematik 106 (2016), 107--116.

Shigeo Koshitani, Caroline Lassueur: Endo-trivial modules for finite groups with dihedral Sylow 2-subgroups , Journal of Group Theory 19 (2016), 635--660.

Radha Kessar, Shigeo Koshitani and Markus Linckelmann,: On the Brauer indecomposability of Scott module , Quarterly Journal of Mathematics (Oxford Journal), 66 (2015), 895--903.

Radha Kessar, Shigeo Koshitani and Markus Linckelmann,: On symmetric quotients of symmetric algebras , Journal of Algebra, 442 (2015), 423--437.

Shigeo Koshitani, Caroline Lassueur: Endo-trivial modules for finite groups with Klein-four Sylow 2-subgroups , manuscripta mathematica, 148 (2015), 265--282.

Shigeo Koshitani, Britta Spaeth: Cllifford theory of characters in induced blocks , Proceedings of the American Mathematical Society, 143 (2015), 3687--3702.

Shigeo Koshitani: Finite groups whose first Cartan invariants over a field of characteristic two are two , Journal of Algebra, 426 (2015), 259--272.

Shigeo Koshitani, Juergen Mueller and Felix Noeske: Broue's abelian defect group conjecture and 3-decomposition numbers of the sporadic simple Conway group Co_1 , Journal of Pure and Applied Algebra, 219 (2015), 142--160.

Shigeo Koshitani: On the projective cover of the trivial module over a group agebra of a finite group, Communications in Algebra 42 (2014), 4308-4321

Shigeo Koshitani, Burkhard Kueshammer, Benjamin Sambale: On the Loewy lengths of blocks , Mathematical Proceedings of the Cambridge Philosophical Society 156 (2014), 555-570

Shigeo Koshitani, Juergen Mueller and Felix Noeske: Broue's abelian defect group conjecture for the sporadic simple Janko group J4 revisited , Journal of Agebra 398 (2014) 434--447

Shigeo Koshitani, Juergen Mueller and Felix Noeske: Broue's abelian defect group conjecture holds for the double cover of the Higman-Sims sporadic simple group , Journal of Agebra 376 (2013), 152--173

Radha Kessar, Shigeo Koshitani and Markus Linckelmann: Conjectures of Alperin and Broue for 2-blocks with elementary abelian defect groups of order 8 , Journal fuer die reine und angewandte Mathematik (Crelle's Journal) 671 (2012), 85--130

Shigeo Koshitani, Juergen Mueller and Felix Noeske: Broue's abelian defect group conjecture holds for the sporadic simple Conway group Co3 , Journal of Agebra 348 (2011), 354--380

Shigeo Koshitani and Yutaka Yoshii: Eigenvaues of Cartan matrices of principal 3-bocks of finite groups with abelian Syow 3-subgroups Journal of Agebra 324 (2010) 1985--1993

Shigeo Koshitani and Juergen Mueller: Broue's abelian defect group conjecture holds for the Harada-Norton sporadic simple group HN , Journal of Agebra 324 (2010) 394--429

Miles Holloway, Shigeo Koshitani and Naoko Kunugi: Blocks with nonabelian defect groups which have cyclic subgroups of index p, , Archiv der Mathematik 94 (2010) 101--116

Shigeo Koshitani and Naoko Kunugi: Trivial source modues in blocks with cyclic defect groups , Mathematische Zeitschrift 265 (2010) 161-172

Shigeo Koshitani, Naoko Kunugi and Katsushi Waki: Broue's abelian defect group conjecture holds for the Janko simple group $J_4$ , Journal of Pure and Appied Agebra 212 (2008) 1438-1456

Morton E. Harris and Shigeo Koshitani: An extension of Watanabe's theorem for the Isaacs-Horimoto-Watanabe corresponding blocks , Journal of Agebra 296 (2006) 96--109

Shigeo Koshitani and Markus Linckemann: The Indecomposability of a certain bimodule given by the Brauer construction , Journal of Agebra 285 (2005) 726-729

Shigeo Koshitani and Naoko Kunugi: Blocks of central p-group extensions , Proceedings of the American Mathematical Society 133 (2005) 21-26

Shigeo Koshitani, Naoko Kunugi and Katsushi Waki: Broue's abelian defect group conjecture for the Held group and the sporadic Suzuki group , Journal of Agebra 279 (2004) 638-666



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