Glen Eugene Bredon (August 24, 1932 in

Fresno, California Fresno () is a major city in the San Joaquin Valley of California, United States. It is the county seat of Fresno County and the largest city in the greater Central Valley region. It covers about and had a population of 542,107 in 2020, makin ...

– May 8, 2000, in

North Fork, California North Fork (formerly Brown's and Northfork; Mono wa?ahhpY', "cedar grove") is a census-designated place (CDP) in Madera County, California, United States. As of the 2020 United States census it had a population of 3,250. It is part of the Ma ...

) was an American mathematician who worked in the area of

topology In mathematics, topology (from the Greek words , and ) is concerned with the properties of a geometric object that are preserved under continuous deformations, such as stretching, twisting, crumpling, and bending; that is, without closing ...

Education and career

Bredon received a bachelor's degree from

Stanford University Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California. The campus occupies , among the largest in the United States, and enrolls over 17,000 students. Stanford is conside ...

in 1954 and a master's degree from

Harvard University Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of highe ...

in 1955. In 1958 he wrote his PhD thesis at Harvard (''Some theorems on transformation groups'') under the supervision of Andrew M. Gleason. Starting in 1960 he worked as a professor at the

University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant u ...

and since 1969 at

Rutgers University Rutgers University (; RU), officially Rutgers, The State University of New Jersey, is a Public university, public land-grant research university consisting of four campuses in New Jersey. Chartered in 1766, Rutgers was originally called Queen's ...

, until he retired in 1993, after which he moved to

. From 1958 to 1960 and 1966/67 he was at the

Institute for Advanced Study The Institute for Advanced Study (IAS), located in Princeton, New Jersey, in the United States, is an independent center for theoretical research and intellectual inquiry. It has served as the academic home of internationally preeminent schola ...

. The Bredon cohomology of topological spaces under action of a topological group is named after him. In the late 1980s, he wrote the program DOS.MASTER for

Apple II The Apple II (stylized as ) is an 8-bit home computer and one of the world's first highly successful mass-produced microcomputer products. It was designed primarily by Steve Wozniak; Jerry Manock developed the design of Apple II's foam-mo ...

computers. He is the author of the programs

Merlin Merlin ( cy, Myrddin, kw, Marzhin, br, Merzhin) is a mythical figure prominently featured in the legend of King Arthur and best known as a mage, with several other main roles. His usual depiction, based on an amalgamation of historic and leg ...

macro assembler Macro (or MACRO) may refer to: Science and technology * Macroscopic, subjects visible to the eye * Macro photography, a type of close-up photography * Image macro, a picture with text superimposed * Monopole, Astrophysics and Cosmic Ray Observat ...

) and ProSel for Apple machines.

Personal life

In 1963, while at Berkeley, he married folk singer

Anne Bredon Anne Leonard Bredon (born Anne Loeb; September 7, 1930 – November 9, 2019) was an American folk singer, best known for composing the song " Babe I'm Gonna Leave You" while she was a student at University of California, Berkeley in the late 1950s ...

(née Loeb), with whom he had two children, Aaron and Joelle.

Apple software

Bredon is the author of the programs

) 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 A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magneti ...

or 3½"

floppy disk A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined w ...

and run from

ProDOS ProDOS is the name of two similar operating systems for the Apple II series of personal computers. The original ProDOS, renamed ProDOS 8 in version 1.2, is the last official operating system usable by all 8-bit Apple II series computers, and ...

. Bredon wrote it as a commercial program during the late 1980s where it experienced widespread success; it was released into the

public domain The public domain (PD) consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable. Because those rights have expired, ...

by his family after the author's death.Public.Domain.notice.txt
on apple2.org.za DOS.MASTER was created as a result of Apple Computer's abandonment of the DOS 3.3

operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also ...

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.

Works

* * *''Equivariant Cohomology Theories'',

Lecture Notes in Mathematics ''Lecture Notes in Mathematics'' is a book series in the field of mathematics, including articles related to both research and teaching. It was established in 1964 and was edited by A. Dold, Heidelberg and B. Eckmann, Zürich. Its publisher is Spr ...

, Springer Verlag, 1967 * * * * *''Topology and Geometry, Graduate Texts in Mathematics'',

Springer Verlag Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 i ...

1993, 1996 *

References

External links

About Glen Bredon – In Memoriam
{{DEFAULTSORT:Bredon, Glen 1932 births 2000 deaths People from Fresno, California Mathematicians from California 20th-century American mathematicians Stanford University alumni Harvard University alumni University of California, Berkeley College of Letters and Science faculty Rutgers University faculty Institute for Advanced Study visiting scholars Topologists