Glen Bredon

Glen Eugene Bredon (August 24, 1932 in Fresno, California – May 8, 2000)[1] was an American mathematician who worked in the area of topology.

Glen Eugene Bredon
DiedMay 8, 2000(2000-05-08) (aged 67)


Bredon received a bachelor's degree from Stanford University in 1954 and a master's degree from Harvard University in 1955. In 1958 he wrote his PhD thesis at Harvard (Some theorems on transformation groups) under the supervision of Andrew M. Gleason.[2][3] Since 1960 he worked as a professor at the University of California, Berkeley and since 1969 at Rutgers University, until he retired in 1993.

From 1958 to 1960 and 1966/67 he was at the Institute for Advanced Study.

The Bredon cohomology of topological spaces under action of a topological group is named after him.[4]

In the late 1980s, he wrote the program DOS.MASTER for Apple II computers. He is the author of the programs Merlin (a macro assembler) and ProSel for Apple machines.

Personal life

In 1963, he married folk singer Anne Bredon, with whom he had two children.

Apple software

Bredon is the author of the programs Merlin (a macro assembler) and ProSel for Apple machines.

DOS.MASTER (also: DOS Master) is a program for Apple II computers which allows Apple DOS 3.3 programs to be placed on a hard drive or 3½" floppy disk and run from ProDOS. Bredon wrote it as a commercial program during the late 1980s where it experienced widespread success; it was released into the public domain by his family after the author's death.[5]

DOS.MASTER was created as a result of Apple Computer's abandonment of the DOS 3.3 operating system and its subsequent replacement by ProDOS. Apple provided a program to copy files from DOS 3.3 volumes to new ProDOS volumes; however, programs written for DOS 3.3 did not run on ProDOS volumes. DOS.MASTER enabled a widely installed base of previously ProDOS incompatible programs written for DOS 3.3 to be run under ProDOS. DOS.MASTER took a large ProDOS partition, formatted it as a file, and then created a series of DOS 3.3 volumes within that file. The program allowed the user to create one of four DOS 3.3 volume sizes: 140 KB (the standard capacity of an Apple II 5¼" floppy disk), 160 KB, 200 KB, or 400 KB (the maximum that DOS 3.3 could address). Up to 255 of these volumes could be created on the larger ProDOS partition, space allowing, essentially simulating a very large stack of virtual floppy disk drives.


  • Topology and Geometry, Graduate Texts in Mathematics, Springer Verlag 1993, 1996
  • Sheaf Theory, McGraw Hill 1967, 2nd printing, Graduate Texts in Mathematics, Springer Verlag 1997
  • Introduction to Compact Transformation Groups, Academic Press 1972
  • Equivariant Cohomology Theories, Lecture Notes in Mathematics, Springer Verlag 1967
  • with John W. Wood: Non-orientable surfaces in orientable 3-manifolds, Inventiones Mathematicae, 7, 1969, 83–110
  • The cohomology ring structure of a fixed point set, Annals of Mathematics, 80, 1964, 524–537
  • Fixed point sets of actions on Poincaré duality spaces, Topology 12, 1973, 159–175


  1. Date of birth according to American Men and Women of Science, Thomson Gale
  2. "Glen Eugene Bredon". Mathematics Genealogy Project. 2018. Archived from the original on 2018-12-08. Retrieved 2018-12-08.
  3. Bolker, Ethan D. "Andrew M. Gleason: 1921–2008" (PDF). Notices of the American Mathematical Society. 56 (10): 1262. Archived from the original (PDF) on 2018-12-08. Retrieved 2018-12-08.
  4. Bredon cohomology, ncatlab
  5. Public.Domain.notice.txt on
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