John Rainwater
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The fictitious mathematician John Rainwater was created as a student prank but has become known as the author of important results in
functional analysis Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (e.g. inner product, norm, topology, etc.) and the linear functions defined o ...
. At the
University of Washington The University of Washington (UW, simply Washington, or informally U-Dub) is a public research university in Seattle, Washington. Founded in 1861, Washington is one of the oldest universities on the West Coast; it was established in Seattl ...
in 1952, John Rainwater was invented and enrolled in a mathematics course by graduate students who were in possession of a duplicate student-registration form. Later, mathematicians published under the
pseudonym A pseudonym (; ) or alias () is a fictitious name that a person or group assumes for a particular purpose, which differs from their original or true name (orthonym). This also differs from a new name that entirely or legally replaces an individua ...
of John Rainwater. Papers were published under the name Rainwater mainly in
functional analysis Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (e.g. inner product, norm, topology, etc.) and the linear functions defined o ...
, particularly in the geometric theory of
Banach spaces In mathematics, more specifically in functional analysis, a Banach space (pronounced ) is a complete normed vector space. Thus, a Banach space is a vector space with a metric that allows the computation of vector length and distance between vector ...
and in convex functions. Rainwater's theorem is an important result in
summability theory In mathematics, a divergent series is an infinite series that is not convergent, meaning that the infinite sequence of the partial sums of the series does not have a finite limit. If a series converges, the individual terms of the series must ...
and functional analysis. The University of Washington's seminar in functional analysis is called the Rainwater seminar, and the associated Rainwater notes have influenced Banach-space theory and
convex analysis Convex analysis is the branch of mathematics devoted to the study of properties of convex functions and convex sets, often with applications in convex minimization, a subdomain of optimization theory. Convex sets A subset C \subseteq X of som ...
. The concept of a fictional pseudonym used by multiple people creating valuable mathematics is not unique. Most notably, Nicolas Bourbaki has been the
collective pseudonym A pseudonym (; ) or alias () is a fictitious name that a person or group assumes for a particular purpose, which differs from their original or true name (orthonym). This also differs from a new name that entirely or legally replaces an individua ...
for a number of leading mathematicians writing in French for many decades.


Creation

John Rainwater was invented by graduate students at the University of Washington in 1952, when students used an extra registration form to enroll Rainwater in a course on
real function In mathematical analysis, and applications in geometry, applied mathematics, engineering, and natural sciences, a function of a real variable is a function whose domain is the real numbers \mathbb, or a subset of \mathbb that contains an interv ...
s. Students submitted homework for Rainwater throughout the semester. The professor caught on to the prank around the middle of the term. Other students in the class were made aware of the situation from the professor's enigmatic remarks after he became the victim of a novelty "exploding"
fountain pen A fountain pen is a writing instrument which uses a metal nib to apply a water-based ink to paper. It is distinguished from earlier dip pens by using an internal reservoir to hold ink, eliminating the need to repeatedly dip the pen in an in ...
bearing Rainwater's name.


Research

Early on, Rainwater distinguished himself by solving problems in the '' American Mathematical Monthly'', whose sponsoring society, the Mathematical Association of America, invited him to join. John R. Isbell published the first paper in Rainwater's name. Other mathematicians have published papers using the name "Rainwater", and acknowledged "Rainwater's assistance" in articles. The seminar on
functional analysis Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (e.g. inner product, norm, topology, etc.) and the linear functions defined o ...
at the University of Washington has been called the "Rainwater seminar". Rainwater's theorem is an important result in summability theory and Banach-space theory.


Evaluation

In 2002 Robert Phelps summarized the impact of Rainwater's research. The first Rainwater paper (by Isbell) was in topology and had had 19 citations. While only one page, Rainwater's note in the 1963 '' Proceedings of the American Mathematical Society'' had had eight citations in papers; its main result has been called " Rainwater's theorem" in books on convex functions and
functional analysis Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (e.g. inner product, norm, topology, etc.) and the linear functions defined o ...
. "There is even one citation to number 13, his unpublished 1967 ''Rainwater Seminar'' note on Lindenstrauss spaces," which are named after a construction by
Joram Lindenstrauss Joram Lindenstrauss ( he, יורם לינדנשטראוס) (October 28, 1936 – April 29, 2012) was an Israeli mathematician working in functional analysis. He was a professor of mathematics at the Einstein Institute of Mathematics. Biograp ...
. "In summary, it appears that most of John Rainwater's published work has been reasonably well received." While Rainwater is lesser known and younger than Nicolas Bourbaki, the collective pseudonym for a number of leading mathematicians writing in French, he is more senior and has more publications than the combination of research by three other pseudonymous mathematicians— Peter Orno, M. G. Stanley, and H. C. Enos.


Mathematicians publishing as Rainwater

Many internationally renowned mathematicians have published under the name of John Rainwater. John Isbell wrote Rainwater's first, second, and tenth papers; by 2002, Isbell had also written or coauthored six other pseudonymous papers under two other names. Functional analyst Robert R. Phelps wrote the third, ninth, eleventh (an unpublished note for the Rainwater seminar), twelfth, and thirteenth (with Peter D. Morris), fifteenth (with Isaac Namioka), and sixteenth (with David Preiss) papers. Irving Glicksberg wrote the fourth and eighth papers.
Edgar Asplund Edgar is a commonly used English given name, from an Anglo-Saxon name ''Eadgar'' (composed of '' ead'' "rich, prosperous" and '' gar'' "spear"). Like most Anglo-Saxon names, it fell out of use by the later medieval period; it was, however, re ...
wrote the seventh. "Paper 14 is a departure for John Rainwater. Not only is it in algebra, but he doesn't thank anyone for helpful conversations. He notes, however, that his work was supported by four different grants. (Culprits this time were Ken Brown,
Ken Goodearl Ken or KEN may refer to: Entertainment * ''Ken'' (album), a 2017 album by Canadian indie rock band Destroyer. * ''Ken'' (film), 1964 Japanese film. * ''Ken'' (magazine), a large-format political magazine. * Ken Masters, a main character in ...
, Toby Stafford and Bob Warfield.)" John Rainwater's c.v. lists an incomplete collection of problems or solutions that he contributed to the '' American Mathematical Monthly'', the earliest in 1959 (by John Isbell).


Notes


References

* * *


Further reading

The Rainwater seminar and Rainwater notes are listed as influences by the following books: * * *


See also

* Monsieur LeBlanc (pseudonym of Sophie Germain) Collaborative pseudonyms: * Nicolas Bourbaki * Arthur Besse * Blanche Descartes * G. W. Peck


External resources

* {{DEFAULTSORT:Rainwater, John Functional analysts Topologists Fictional mathematicians University of Washington faculty Pseudonymous mathematicians Academic shared pseudonyms Mathematical humor 1952 in science