V I
CONTENTS
§4. Algebraic groups, general theory
Real algebraic quotients
RALPH J. BREMIGAN 195
Frobenius splitting of spherical varieties
M. BRION AND S. P. INAMDAR 207
Generalized Kloosterman sums
ROMUALD D^BROWSKI 219
Symmetric Avarieties
A. G. HELMINCK 233
Identities for prounipotent groups
A N D Y R . MAGI D 281
On the structure of nonreduced parabolic subgroup-schemes
CHRISTIAN WENZEL 291
§5. Representations
Weight modules without highest weight
A. J. COLEMAN 299
Extremal composition factors for groups of Lie type
J. E. HUMPHREYS 303
Relative invariants of the polynomial rings over the finite and
tame type quivers
KOIKE KAZUHIKO 311
§6. Invariant theory
Hilbert series for modules of covariants
BRAM BROER 321
The first fundamental theorem of invariant theory and spherical
subgroups
ROGER E. HOWE 333
Algebraic families of 6(2)-actions on affine space
C4
MIKIYA MASUDA AND T E D PETRIE 347
Algebraic equivariant vector bundles and the linearity problem
LUCY MOSER-JAUSLIN 355
Equivariant matrix valued functions
GEORGE F. SEELINGER
365
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