A mathematics educator and senior contributing author of Prealgebra 2e.[ref]

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A mathematics educator and senior contributing author of Prealgebra 2e.[ref]

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A mathematics educator and senior contributing author of Prealgebra 2e.[ref]

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Instructor for the 2012 Topology I: smooth manifolds (MAT1300HF) course; the course information explicitly identifies his role as instructor.
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Portrait of Gaston Floquet
. Portrait identified on the MacTutor portrait page.

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Figure 1. . Portrait identified on the MIT profile photograph page.

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Portrait of Harold W. Kuhn
. Portrait identified on the Princeton University obituary. Image credit: Princeton University Office of Communications.
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Portrait of Albert W. Tucker
. Portrait identified on the MacTutor biography.

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Portrait of Daniel Dadush
. Photograph linked on the CWI personal homepage.

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Portrait of Steven G. Krantz
. Photograph identified on the university profile.

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Figure 1. . Photograph identified on the university profile.

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Portrait of Nico M. Temme
. Photograph identified on the NIST DLMF profile.

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Homepage photograph for Jan-Hendrik Evertse
. Image linked from the Leiden Mathematical Institute homepage and labelled Oberwolfach 2012.

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Portrait of Frank W. J. Olver
. Photograph identified on the NIST DLMF profile.

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Figure 1. . Photograph identified on the portrait record.

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Figure 1. . Historical portrait identified on the portrait record. Source.
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Johann Andreas von Segner
. Historical portrait identified on the portrait record. Source.

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Portrait of Euclid
. Later imagined depiction dated 1584, identified on Wikimedia Commons. This is not an authentic likeness from antiquity; Commons identifies the artwork as public domain. Source.

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Portrait of Marin Mersenne
. Engraving dated 1654 on Wikimedia Commons, which identifies the artwork as public domain. Source.
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Portrait of Refael Hassin
. Photograph identified on the Tel Aviv University profile.

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Portrait of Herbert Robbins
. Photograph identified on the University of St Andrews portrait page.

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Figure 1. . Photograph identified on the named portrait page. Source.

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Figure 1. . Photograph identified on the named portrait page.

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Portrait of George Pólya
. Photograph identified on the named portrait page. Source.

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Portrait of Claude Berge
. Photograph identified on the named portrait page.

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Portrait of Gerald Teschl
. Portrait identified on the TU Wien viennaPDE profile.

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Portrait of Ilse Ipsen
. Portrait identified on the NC State University profile.

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A mathematician working in computability theory, and the author of Discrete Mathematics: An Open Introduction.[ref]
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Portrait of Oscar Levin
. Source: institutional profile, which identifies the image as a headshot of Oscar Levin.
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Articles by others on the same topic (2)

A mathematician is someone who is professionally engaged in the field of mathematics, which is the study of numbers, quantities, structures, spaces, and the relationships between them. Mathematicians can work in various areas, including pure mathematics (theoretical aspects that explore mathematical concepts and ideas for their own sake) and applied mathematics (using mathematical theories and techniques to solve practical problems in fields such as engineering, physics, economics, biology, and computer science).
Mathematician by Ciro Santilli 40 Updated 2025-07-16
Poet, scientists and warriors all in one? Conquerors of the useless.
A wise teacher from University of São Paulo once told the class Ciro Santilli attended an anecdote about his life:
I used to want to learn Mathematics.
But it was very hard.
So in the end, I became an engineer, and found an engineering solution to the problem, and married a Mathematician instead.
It turned out that, about 10 years later, Ciro ended up following this advice, unwittingly.
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xkcd 435: Fields arranged by purity
. Source.