Grants

National Science Foundation, Division of Mathematical Sciences
Research at Undergraduate Institutions, with Greene at Haverford.
Grant DMS-9500962: Algebraic and enumerative combinatorics
6/95-5/98
National Science Foundation, Division of Human Resource Development
Visiting Professorships for Women, partially supports leave at MSRI.
Grant HRD-9627172: Topological insights in combinatorics.
8/96-6/97
National Science Foundation, Division of Undergraduate Education
Course and Curriculum Development, with economist Ball at Haverford,
physical chemist Butler at Chicago, and mathematician Kuhn at Princeton.
Grant DUE-9455972: Mathematics concentrations in economics and chemistry
11/94-4/97
National Security Agency, Mathematical Sciences Program
Grant MDA90-H-4029:The algebraic combinatorics of Hall-Littlewood
symmetric functions
5/90-12/93

Summer consulting and teaching

Summer Program for Women in Math - George Washington University.
Led a seminar on number theory and public key cryptography for women
undergraduates recruited nationwide.
2005
Haverford College curriculum development with mathematics majors.
Directed work of Pat Flanigan and Aaron Finch. Funded by Oakely-Allendorfer.
2005
Haverford College enrichment experience for mathematics majors.
Directed study of Nick Kerr and Scott Sargrad. Funded by Oakley-Allendorfer
2003
IDA Center for Communications Research - Princeton. Cryptology.
1998
Haverford College research experience for mathematics majors.
Directed work of Scott Kravitz. Funded by NSF.
1997
Haverford College research experience for mathematics majors.
Directed work of Brian Karl and Ryan Walker. Funded by NSF.
1996
Haverford College research experience for mathematics majors.
Directed work of Amy Spencer and Noel Watson. Funded by NSF.
1995
IDA Center for Communications Research - La Jolla. Cryptology.
Coauthored paper with Steve Fischer, Miller Maley and Andrew Mayer.
1994
Summer Mathematics Institute at Berkeley and Mills. Led a seminar
on finite reflection groups for women undergraduates recruited nationwide.
1993
Summer Mathematics Institute at Berkeley and Mills. Led a seminar
on linear optimization for women undergraduates recruited nationwide.
1992
IDA Center for Communications Research - Princeton. Cryptology.
Wrote two papers, one coauthored with Neil White.
1990
IDA Center for Communications Research - Princeton. Cryptology.
Coauthored paper with Doug Wiedemann and Neal Zierler.
1989

Selected recent papers

A. Björner, L. M. Butler and A. O. Matveev, "Note on a combinatorial application of Alexander duality", Journal of Combinatorial Theory A80, (1997), 163-165. (preprint)
L. M. Butler, "Order analogues and Betti polynomials", Advances in Mathematics 121, (1996), 62-79. Also available as DIMACS Technical Report 91-37.
L. M. Butler, "Subgroup lattices and symmetric functions", Memoirs of the American Mathematical Society, Volume 112, Number 539, November 1994.
Dennis White reported the following error in "Subgroup lattices and
symmetric functions": Proposition 2.4.36 is false. In the computation
of charge, corresponding subwords of Knuth equivalent words need
not be Knuth equivalent. For example: w=24213431 has subwords
w1=2431 and w2=2413; v=42213431 has subwords v1=2431 and
v2=4213; w and v are Knuth equivalent, but w2 and v2 are not.
Corollary 2.4.38 is true.

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This page was created by lbutler@haverford.edu. It was last updated 6/19/05.