math 5400, history of mathematicspcgibson/math5400/math5400files/lectures/lect… · summary 1...

MATH 5400, History of MathematicsLecture 1: Introduction

Professor: Peter Gibson

[email protected]

http://people.math.yorku.ca/pcgibson/math5400

September 8, 2016

The history of...what, exactly?

What is mathematics?

P. Gibson (YorkU) Math 5400 8.9.2016 2 / 16

The history of...what, exactly?

What is mathematics?

A proposed answer

1 Mathematics is the science of the abstract.

2 It is a scholarly pursuit conducted with precision and rigour.

3 Mathematical ideas have been—and continue to be—central tocultural developments that have dramatically altered human society.

A proposed answer

The science of the abstract

An abstract painting:

Mark Rothko, Magenta, Black, Green on Orange, 1947

Abstract refers to precisely defined abstract structures, such as numbers,arithmetic operations, lines, curves,...limits, differential equations...,groups, Riemannian manifolds,measure spaces, categories etc., etc...

Abstract refers to precisely defined abstract structures, such as numbers,arithmetic operations, lines, curves,...

limits, differential equations...,groups, Riemannian manifolds,measure spaces, categories etc., etc...

Abstract refers to precisely defined abstract structures, such as numbers,arithmetic operations, lines, curves,...limits, differential equations...

,groups, Riemannian manifolds,measure spaces, categories etc., etc...

Abstract refers to precisely defined abstract structures, such as numbers,arithmetic operations, lines, curves,...limits, differential equations...,groups, Riemannian manifolds,

measure spaces, categories etc., etc...

Abstract refers to precisely defined abstract structures, such as numbers,arithmetic operations, lines, curves,...limits, differential equations...,groups, Riemannian manifolds,measure spaces, categories etc.

, etc...

Rigour and precisionPrecision and rigour confer a kind of timelessness that makes mathematicsunique among scholarly pursuits.

An example of some old mathematics: al-Karaji (c. 972)

This is a area of current research!

This is a area of current research!P. Gibson (YorkU) Math 5400 8.9.2016 5 / 16

Some changes in human society...

the first city states (civic administration)

industrialization

electricity (motors, artificial light, radio)

computers (so much for the slide rule...)

the iPhone (the information age in full swing)

These all have mathematical underpinnings.

industrialization

History

History is bunk.

—Henry Ford

How can we understand the history of mathematics?

What is the purpose of history?

History tells us not only about the past, but also the present.

What is the purpose of history?

History tells us not only about the past, but also the present.

An analogy: the study of genetics and evolution relates to both the pastand present structure of organisms, simultaneously.

(Ernst Haeckel)

Similarly, the history of human culture refers simultaneously to the pastand present. (Consider language: current usage embeds remnants of pastculture.)

(Ernst Haeckel)

Similarly, the history of human culture refers simultaneously to the pastand present.

(Consider language: current usage embeds remnants of pastculture.)

(Ernst Haeckel)

The historical method

We distinguish several types of sources:

primary sources

secondary sources

tertiary sources

Three key questions:

1 What do we know?

2 How do we know it?

3 What don’t we know?

primary sources

secondary sources

tertiary sources

1 What do we know?

primary sources

secondary sources

tertiary sources

1 What do we know?

primary sources

secondary sources

tertiary sources

1 What do we know?

primary sources

secondary sources

tertiary sources

1 What do we know?

Some examples from the history of mathematics

The dawn of civilization:

A clay tablet from Uruk (c. 31st century BC).

A much more recent tablet:

Examples of Pythagorean triples (c. 18th century BC) in sexagesimalnotation.

A much more recent tablet:

Examples of Pythagorean triples (c. 18th century BC) in sexagesimalnotation.

Al-Karaji, again:

On the construction of water wells (c. 10th century AD).

Al-Karaji, again:

On the construction of water wells (c. 10th century AD).

An eighteenth century example:Euler’s translation of Benjamin Robins’s work on ballistics.

Sfltut

ARTILLERIE

einer Unterfucfcuntj{i>D(^^te

(am] famen

bem ^nglif^en t>ea ^)rn. Benjamin 9vobin

Seon^arb u(er

364 BAS ZWEYTE CAPITEL VON DEM WIEDEKSTANDE DEE LUFT [636637

wovon das Integrale 1st

Setzt man nun Kurze halber =z, und e fur die Zahl, deren hyperbolischer

Logarithmus == 1, so wird

Die andere Aequation

dt~*~^

r//_~ 4wc

.t(, f ~~

3 (& -h ) v yt?

Man setze, um die Irrationalitat zu heben, h = aa, und t; = uu, so wird

-4^c $aadii Snc/ du du\3 uu(aa-{-uu) 3 \aa + ww w^^/

wovon das Integrale zum Theil auf der Quadratur des Zirkuls beruht. Dennes ist

/adu. , w== A. tang. ,aa + 'uu D a

das ist einem Zirkul-Bogen, dessen tangens = , wenn der Eadius = 1 ge-

nomruen wird. Also bekommt man

, 8c/i A , w.l ^\t -= - A. tang. C } .

3 \a & a ' u J

Man setze nun wiederum a = Yh9und u = Yv, und bestimme die GrroBe C

dergestalt, daB t; = b wird, wenn t == 0, so wird man finden

(r- A. tang. ^~ ~ A. tang. -- A ; r )

\yjt8Yh yh

*Yh YV yvyv

Summary

2 It is a scholarly pursuit conducted with precision and rigour.3 Mathematical ideas have been—and continue to be—central to

cultural developments that have dramatically altered human society.

I the first city states (civic administration)I industrializationI electricity (motors, artificial light, radio)I computers (so much for the slide rule...)I the iPhone (the information age in full swing)I and much more...

Summary

2 It is a scholarly pursuit conducted with precision and rigour.3 Mathematical ideas have been—and continue to be—central to

cultural developments that have dramatically altered human society.I the first city states (civic administration)I industrializationI electricity (motors, artificial light, radio)I computers (so much for the slide rule...)I the iPhone (the information age in full swing)I and much more...

primary sources

secondary sources

tertiary sources

1 What do we know?

primary sources

secondary sources

tertiary sources

1 What do we know?

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