X

CONTENTS

Homotopy commutativity and the EHP sequence

B. GRAY

A proof of Gray's conjecture

J. R. HARPER

Analytic functors, unstable algebras and cohomology of classifying

spaces

H.-W. HENN, J. LANNES, and

L.

SCHWARTZ

Statistical mechanics and the Alexander polynomial

L.

H. KAUFFMAN

A quotient of the iterated Singer construction

J. KULICH

A generalization of a theorem of Heeke to the Siegel space of degree two

R. LEE and S. H. WEINTRAUB

A Koszul algebra whose cohomology is the £ 3-term of the May spectral

sequence for the Steenrod algebra

W.-H. LIN

K -theory and unstable homotopy groups

M. MAHOWALD and R. THOMPSON

The elliptic character and the Witten genus

H. MILLER

On the characteristic ring of flat bundles defined over a number field

G. MISLIN

Loops on the 3-sphere and umbral calculus

N.RAY

Characteristic classes and 2-modular representations of some sporadic

simple groups

C. B. THOMAS

On the connectivity of the classifying spaces for foliations

181

189

197

221

233

243

261

273

281

291

297

303

T.TSUBOI

319

Maximal abelian subgroups of Spinor groups and error-correcting codes

J. A. WOOD

333

CONTENTS

Homotopy commutativity and the EHP sequence

B. GRAY

A proof of Gray's conjecture

J. R. HARPER

Analytic functors, unstable algebras and cohomology of classifying

spaces

H.-W. HENN, J. LANNES, and

L.

SCHWARTZ

Statistical mechanics and the Alexander polynomial

L.

H. KAUFFMAN

A quotient of the iterated Singer construction

J. KULICH

A generalization of a theorem of Heeke to the Siegel space of degree two

R. LEE and S. H. WEINTRAUB

A Koszul algebra whose cohomology is the £ 3-term of the May spectral

sequence for the Steenrod algebra

W.-H. LIN

K -theory and unstable homotopy groups

M. MAHOWALD and R. THOMPSON

The elliptic character and the Witten genus

H. MILLER

On the characteristic ring of flat bundles defined over a number field

G. MISLIN

Loops on the 3-sphere and umbral calculus

N.RAY

Characteristic classes and 2-modular representations of some sporadic

simple groups

C. B. THOMAS

On the connectivity of the classifying spaces for foliations

181

189

197

221

233

243

261

273

281

291

297

303

T.TSUBOI

319

Maximal abelian subgroups of Spinor groups and error-correcting codes

J. A. WOOD

333