Vol. 137, No. 1, 1989
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Henry Abel Dye
iii–v

V. S. Varadarajan
An application of Dye’s theorem on projection lattices to orthogonally decomposable isomorphisms
1–13

Huzihiro Araki
The limit of a sequence of squares in an algebra need not be a square
15–18

Richard Arens
An addition formula for the index of semigroups of endomorphisms of B(H)
19–36

William Arveson
Crossed products and Galois extensions of Hopf algebras
37–54

Robert James Blattner and Susan Montgomery
On the vanishing of Hn(𝒜,𝒜∗) for certain C∗-algebras
55–63

Erik Christensen and Allan M. Sinclair
Nonanalytic functional calculi and spectral maximal spaces
65–85

Philip C. Curtis, Jr. and Michael M. Neumann
Addition of C∗-algebra extensions
87–121

George A. Elliott and David E. Handelman
Some affine geometric aspects of operator algebras
123–144

Yaakov Friedman and Bernard Russo
Regularization of actions of groups and groupoids on measured equivalence relations
145–154

Valentin Ya. Golodets and Sergey D. Sinelshchikov
CCR-rings
155–157

Irving Kaplansky
Characterization of crossed product (properly infinite case)
159–167

Hideki Kosaki
Three quavers on unitary elements in C∗-algebras
169–179

Gert Kjærgaard Pedersen
Relative dimension, towers of projections and commuting squares of subfactors
181–207

Sorin Popa
On a new method for defining the norm of Fourier-Stieltjes algebras
209–223

Martin E. Walter