**Major Accomplishments**

After receiving his M.S. in 1951, from the University
of Michigan, Stubblefield became

the Professor and Head of the Department of Mathematics at the University
of Liberia at

Monrovia from 1952-1956. From 1957-1959, he was a Research Mathematician at

Detroit Arsenal. Upon receiving his Ph.D. in 1959, from the University of
Michigan, he

served the as Lecturer and National Science foundation Post-Doctoral Fellow
at the

University of Michigan in Ann Arbor until 1960. Stubblefield served as assistant
Professor

of Mathematics at Stevens Institute of Technology in Hoboken, New Jersey form

1960-1961. He was an associate Professor of Mathematics at Oakland University,
in

Michigan from 1961-1967. From 1967-1970, he was on leave. When he returned,
he

was a Senior National Teaching Fellow at Prairie View, Texas until 1968. For
the next

year, he would be a Visiting Professor and Visiting Scholar and Texas Southern
University.

From 1969-1971, he was the Director of Mathematics in the Thirteen College
Curriculum

Program. Then in 1971, he served as a Professor of Mathematics at Appalachian
State

University in Boone, North Carolina until 1976. At the U.S. Department of
Commerce in

Boulder, Colorado, he served as Mathematician/EEO Manager from 1976-1981.
In 1992,

Stubblefield retired from the U.S. Department of Commerce with GERL/ERL/NOAA.

Stubblefield, along with others, helped to establish NAM as an international
organization.

He was the person who, in 1978, approved NAM's first major grant. In 1994,
he received

NAM's Distinguished Service Award, and in 2000, Stubblefield became the eight
recipient

of NAM's highest award, the Lifetime Achievement Award (mad).

Through his many years of research,
Stubblefield had several publications on the subjects of

geometry, trigonometry, and computer programming. His publications that he
used for

teaching were Informal Geometry, An Intuitive Approach to Elementary Geometry,
and

Structures of Number Systems. In 1962, he published his paper entitled Some
imbedding

and non-imbedding theorems for N-manifolds. Several years later in 1973, The
number of

topologies on a set of eight elements, was published. Finally in 1980, he
published the paper

Lower bounds for oddperfect numbers (beyond the googol) (mad).

Stubblefield has been one of the
mathematicians that have contributed their knowledge and

research, in trying to determine if odd perfect numbers exist. As a result,
he has found a new

lower bound for odd perfect numbers, 10^50 (lower, 211-222).