Projections and Retractions

Projections and Retractions

The main result of this paper is a generalization of a theorem of R. S. Phillips [6] on the nonexistence of projections of l°° onto c0. If S is a locally compact Hausdorff space then let C(S) denote the space of bounded continuous real (or complex) valued functions on 5; also, let Co(S) be those functions in C(S) which vanish at infinity. If N is the space of positive integers with the discrete...

Data Types as Lattices: Retractions, Closures and Projections

Retractions and Correction

BIOCHEMISTRY Retraction for ‘‘Selection of cyclic peptide aptamers to HCV IRES RNA using mRNA display’’ by Alexander Litovchick and Jack W. Szostak, which appeared in issue 40, October 7, 2008, of Proc Natl Acad Sci USA (105:15293–15298; first published September 29, 2008; 10.1073/pnas.0805837105). The authors wish to note the following: ‘‘After thorough efforts by K. Berry in the laboratory of...

Correction and Retractions

BIOCHEMISTRY Correction for “Mod5 protein binds to tRNA gene complexes and affects local transcriptional silencing,” by Matthew Pratt-Hyatt, Dave A. Pai, Rebecca A. Haeusler, Glenn G. Wozniak, Paul D. Good, Erin L. Miller, Ian X. McLeod, John R. Yates III, Anita K. Hopper, and David R. Engelke, which appeared in issue 33, August 13, 2013, of Proc Natl Acad Sci USA (110: E3081–E3089; first publi...

Corrections and Retractions

NEUROSCIENCE. For the article ‘‘AIPL1, the protein that is defective in Leber congenital amaurosis, is essential for the biosynthesis of retinal rod cGMP phosphodiesterase,’’ by Xiaoqing Liu, Oleg V. Bulgakov, Xiao-Hong Wen, Michael L. Woodruff, Basil Pawlyk, Jun Yang, Gordon L. Fain, Michael A. Sandberg, Clint L. Makino, and Tiansen Li, which appeared in issue 38, September 21, 2004, of Proc. ...