Research papers

• Algebraic groups and modular Lie algebras, Mem. Amer. Math. Soc. 71 (1967)
(MR)
• Existence of Levi factors in certain algebraic groups, Pacific J. Math. 23 (1967), 543--546 (PDF) (MR)
• On the automorphisms of infinite Chevalley groups, Canad. J. Math. 21 (1969), 908--911 (PDF) (MR)
• Modular representations of classical Lie algebras, Bull. Amer. Math. Soc. 76 (1970), 878--882 (PDF) (MR)
• Defect groups for finite groups of Lie type, Math. Z. 119 (1971), 149--152 (PDF) (MR)
• Modular representations of classical Lie algebras and semisimple groups, J. Algebra 19 (1971), 51--79 (PDF) (MR)
• Remarks on ``A theorem on special linear groups'', J. Algebra 22 (1972), 316--318 (PDF) (MR)
• Projective modules for finite Chevalley groups (with D.-N. Verma), Bull. Amer. Math. Soc. 79 (1973), 467--468 (PDF) (MR)
• Projective modules for SL(2,q), J. Algebra 25 (1973), 513--518 (PDF) (MR)
• Some computations of Cartan invariants for finite groups of Lie type, Comm. Pure Appl. Math. 26 (1973), 745--755 (MR)
• Variations on Milnor's computation of K_2 Z, pp. 304--307, Algebraic K-Theory II, Lect. Notes in Math. 342, Springer, Berlin, 1973 (MR)
• Weyl groups, deformations of linkage classes, and character degrees for Chevalley groups, Comm. Algebra 1 (1974), 475--490 (MR)
• Representations of SL(2,p), Amer. Math. Monthly 82 (1975), 21--39 (PDF) (MR)
• Ordinary and Modular Representations of Chevalley Groups, Lect. Notes in Math. 528, Springer, Berlin, 1976 (MR)
• On the hyperalgebra of a semisimple algebraic group, pp. 203--210, Contributions to Algebra: A Collection of Papers Dedicated to Ellis Kolchin, Academic Press, New York, 1977 (MR)
• A construction of projective modules in the category O of Bernstein-Gelfand-Gelfand, Indag. Math. 39 (1977), 301--303 (PDF) (MR)
• Hilbert's fourteenth problem, Amer. Math. Monthly 85 (1978), 341--353 (MR)
• Symmetry for finite dimensional Hopf algebras, Proc. Amer. Math. Soc. 68 (1978), 143--146 (PDF) (MR)
• Weyl modules and Bott's theorem in characteristic p, pp. 474--483, Lie Theories and their Applications, Queen's Papers in Pure & Appl. Math. No. 48, Kingston, Ont., 1978 (MR)
• Finite and infinite dimensional modules for semisimple Lie algebras, pp. 1--64, Lie Theories and their Applications, Queen's Papers in Pure & Appl. Math. No.48, Kingston, Ont., 1978 (MR)
• Blocks and indecomposable modules for semisimple algebraic groups (with J.C. Jantzen), J. Algebra 54 (1978), 494--503 (PDF) (MR)
• Deligne-Lusztig characters and principal indecomposable modules, J. Algebra 62 (1980), 299--303 (PDF) (MR)
• Modular representations of finite groups of Lie type, pp. 259--290, Finite Simple Groups II, Academic Press, London, 1980 (MR)
• Cartan invariants and decomposition numbers of Chevalley groups, pp. 347--351, The Santa Cruz Conference on Finite Groups, Proc. Sympos. Pure Math. 37, Amer. Math. Soc., Providence, RI, 1980 (MR)
• Highest weight modules for semisimple Lie algebras, pp. 72--103, Representation Theory I, Lect. Notes in Math. 831, Springer, Berlin, 1980 (MR)
• Ordinary and modular characters of SL(3,p), J. Algebra 72 (1981), 8--16 (PDF) (MR)
• Restricted Lie algebras (and beyond), pp. 91--98, Algebraists' Homage, Contemporary Math. 13, Amer. Math. Soc., Providence, RI, 1982 (MR)
• Arithmetic groups, pp. 73--99, Topics in the Theory of Algebraic Groups, Notre Dame Lecture Notes. No. 10, 1982 (MR)
• On the structure of Weyl modules, Comm. Algebra 12 (1984), 2665--2677 (MR)
• Cartan invariants, Bull. London Math. Soc. 17 (1985), 1--14 (MR)
• Non-zero Ext^1 for Chevalley groups (via algebraic groups), J. London Math. Soc. 31 (1985), 463--467 (MR)
• Cohomology of G/B in characteristic p, Adv. in Math. 59 (1986), 170--183 (PDF) (MR)
• Induced modules for semisimple groups and Lie algebras, pp. 341--349, Lie Algebras and Related Topics (Conf. Proc. of Canad. Math. Soc., vol. 5), Amer. Math. Soc., Providence, RI, 1986 (MR)
• Projective modules for Sp(4,p) in characteristic p, J. Algebra 104 (1986), 80--88 (PDF) (MR)
• Cohomology of line bundles on G/B for the exceptional group G_2, J. Pure Appl. Math. 44 (1987), 227--239 (PDF) (MR)
• The Steinberg representation, Bull. Amer. Math. Soc. (N.S.) 16 (1987), 247--263 (PDF) (MR)
• Generic Cartan invariants for Frobenius kernels and Chevalley groups, J. Algebra 122 (1989), 345--352 (MR)
• Ordinary and modular characters of SU(3,p), J. Algebra 131 (1990), 425--431 (PDF) (MR)
• Cohomology of line bundles on flag varieties in prime characteristic, pp. 193--204, Proc. Hyderabad Conference on Algebraic Groups, Manoj Prakashan, Madras, 1991 (MR)
• Extremal composition factors for groups of Lie type, pp. 303--310, Algebraic Groups and Their Generalizations: Classical Methods, Proc. Sympos. Pure Math. 56, Part 2, Amer. Math. Soc., Providence, RI, 1994 (MR)
• Another look at Dickson's invariants for finite linear groups, Comm. Algebra 22 (1994), 4773--4779 (MR)
• Comparing modular representations of semisimple groups and their Lie algebras, Modular Interfaces (Riverside, CA, 1995), 69--80, AMS/IP Stud. Adv. Math., 4, Amer. Math. Soc., Providence, RI 1997. (MR)
• Modular representations of simple Lie algebras, Bull. Amer. Math. Soc. (N.S.) 35 (1998), 105--122. (PDF) (MR)
• Analogues of Weyl's formula for reduced enveloping algebras, Experiment. Math. 11 (2002), 567--573 (PDF) (MR)
• Representations of reduced enveloping algebras and cells in the affine Weyl group, pp.~63--72, Representations of Algebraic Groups, Quantum Groups, and Lie Algebras, Contemp. Math., 413, Amer. Math. Soc., Providence, RI, 2006; arXiv:math.RT/0502100 (PDF) (MR)

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