Louis Shapiro (mathematician)

{{short description|American mathematician}}

{{Infobox scientist

| name = Louis W. Shapiro

| birth_name =

| image =

| imagesize =

| caption =

| birth_place = United States

| fields = Mathematician

| nationality = American

| alma_mater = Harvard University
University of Maryland, College Park

| doctoral_students =Naiomi Cameron

}}

Louis Welles Shapiro (born 1941){{Cite web|last=|first=|date=|title=Shapiro, Louis W.|url=https://viaf.org/viaf/114739103/|archive-url=|archive-date=|access-date=|website=Virtual International Authority File}} is an American mathematician working in the fields of combinatorics and finite group theory. He is an emeritus professor at Howard University.{{cite web |title=People {{!}} Howard University Department of Mathematics |url=https://mathematics.howard.edu/people |website=mathematics.howard.edu}}

Shapiro attended Harvard University for his undergraduate studies and then the University of Maryland, College Park for graduate school.{{Cite web|url=https://www.genealogy.math.ndsu.nodak.edu/id.php?id=41506|title=Louis Welles Shapiro|website=Math Genealogy Project|language=en-US}} Shapiro is most known for introducing the Riordan array, named after mathematician John Riordan,Louis W. Shapiro, Seyoum Getu, Wen-Jin Woan, Leon C. Woodson,

The Riordan group,

Discrete Applied Mathematics,

Volume 34, Issues 1–3,

1991,

pages 229–239,

ISSN 0166-218X,

https://doi.org/10.1016/0166-218X(91)90088-E.

and developing the theory around it. He has been an organizer of and speaker at the annual International Conference on Riordan Arrays and Related Topics,{{Cite web|url=http://www.tsimf.cn/meeting/show?id=169|title=6th International Conference on Riordan Arrays and Related Topics|website=6th International Conference on Riordan Arrays and Related Topics |language=en-US}}{{Cite web|url=https://sites.google.com/view/5rart/home?authuser=0|title=5th International Conference on Riordan Arrays and Related Topics|website=5th International Conference on Riordan Arrays and Related Topics |language=en-US}} which has been held annually beginning 2014.