Mathematics: Field of study

The word comes from the Greek μάθημα (máthema), meaning "science, knowledge, or learning", and is sometimes shortened to math or maths.

It is the study of:

• Numbers: including how things can be counted.
• Structure: including how things are organized, but also how they can be or could have been. This subfield is usually called algebra.
• Place: where things are, and spatial arrangement, including arrangements of spaces themselves. This subfield is usually called geometry.
• Change: how things become different. This subfield is usually called analysis.

Applied math is useful for solving problems in the real world. People working in business, science, engineering, and construction use math.

Math solves problems by using logic. One of the main tools of logic used by mathematicians is deduction. Deduction is a special way of thinking to discover and prove new truths using old truths. To a mathematician, the reason something is true (called a proof) is just as important as the fact that it is true, and this reason is often found using deduction. Using deduction is what makes mathematical thinking different from other kinds of scientific thinking, which might rely on experiments or on interviews.

Logic and reasoning are used by math people to create general rules, which are an important part of math. These rules leave out information that is not important so that a single rule can cover many situations. By finding general rules, mathematics solves many problems at the same time as these rules can be used on other problems. These rules can be called theorems (if they have been proven) or conjectures (if it is not known if they are true yet). Most math people use non-logical and creative reasoning in order to find a logical proof.

Sometimes, math people finds and studies rules or ideas that we don't understand yet. Often in mathematics, ideas and rules are chosen because they are considered simple or neat. On the other hand, sometimes these ideas and rules are found in the real world after they are studied in mathematics; this has happened many times in the past. In general, studying the rules and ideas of mathematics can help us understand the world better. Some examples of math problems are addition, subtraction, multiplication, division, calculus, fractions and decimals. Algebra problems are solved by evaluating certain variables. A calculator answers every math problem in the four basic arithmetic operations.

Number

Math includes the study of numbers and quantities. It is a branch of science that deals with the logic of shape, quantity, and arrangement. Most of the areas listed below are studied in many different fields of mathematics, including set theory and mathematical logic. The study of number theory usually focuses more on the structure and behavior of the integers rather than on the actual foundations of numbers themselves, and so is not listed in this given subsection.

${\displaystyle 1,2,3,\ldots }$	${\displaystyle \ldots ,-1,0,1,\ldots }$	${\displaystyle {\frac {1}{2}},{\frac {2}{3}},0.125,\ldots }$	${\displaystyle \tau ,\pi ,e,{\sqrt {2}},\ldots }$	${\displaystyle 1+i,2e^{i\pi /3},\ldots }$
Natural numbers	Integers	Rational numbers	Real numbers	Complex numbers
${\displaystyle 0,1,\ldots ,\omega ,\omega +1,\ldots ,2\omega ,\ldots }$	${\displaystyle \aleph _{0},\aleph _{1},\ldots }$	${\displaystyle +,-,\times ,/}$	${\displaystyle <,\leq ,=,\geq ,>}$	${\displaystyle f(x)={\sqrt {x}}}$
Ordinal numbers	Cardinal numbers	Arithmetic operations	Arithmetic relations	Functions, see also special functions

Structure

Structural math studies objects' and constructions' shape and integrity. These are areas of algebra and calculus.

Number theory	Abstract algebra	Linear algebra	Order theory	Graph theory

Shape

Some areas of math study the shapes of things. Most of these areas are part of the study of geometry.

Topology	Geometry	Trigonometry	Differential geometry	Fractal geometry

Change

Some areas of math study the way things change. Most of these areas are part of the study of analysis.

Calculus	Vector calculus	Analysis
Differential equations	Dynamical systems	Chaos theory

Applied mathematics

Applied math uses symbolic logic to solve problems in areas like engineering and physics.

Numerical analysis – Optimization – Probability theory – Statistics – Mathematical finance – Game theory – Mathematical physics – Fluid dynamics - Computational algorithms

These theorems and conjectures have interested mathematicians and amateurs alike:

Pythagorean theorem – FLT – Goldbach's conjecture – Twin Prime Conjecture – Gödel's incompleteness theorems – Poincaré conjecture – Cantor's diagonal argument – Four color theorem – Zorn's lemma – Euler's Identity – Church-Turing thesis

These theorems and hypotheses have greatly changed mathematics:

Central limit theorem classification theorems of surfaces – Continuum hypothesis – Fourier Theorem – Fundamental theorem of calculus – Fundamental theorem of algebra – Fundamental theorem of arithmetic – Fundamental theorem of projective geometry – Gauss-Bonnet theorem - Kantorovich theorem – P Versus NP – Pythagorean theorem – Riemann hypothesis

These are a few conjectures that have been called "revolutionary":

Beal Conjecture (a generalization of FLT) – Birch and Swinnerton-Dyer Conjecture – Collatz Conjecture – Goldbach's Conjecture –Hodge Conjecture – Poincaré Conjecture

Set theory – Symbolic logic – Model theory – Category theory – Logic – Table of mathematical symbols

History and the world of mathematicians

History of mathematics – Timeline of mathematics – Mathematicians – Fields Medal – Abel Prize – Millennium Prize Problems (Clay Math Prize) – International Mathematical Union – Mathematics competitions – Lateral thinking – Mathematics and gender

There is no Nobel Prize in mathematics. Mathematicians can receive the Abel Prize and the Fields Medal for important works.

The Clay Mathematics Institute has said it will give one million dollars to anyone who solves one of the Millennium Prize Problems.

There are many tools used to do math or find answers to math problems.

Older tools

• Abacus
• Napier's bones, Slide rule
• Ruler and Compass
• Mental calculation
• Writing

Newer tools

• Graphing calculators, scientific calculators and more complex computer visual tools
• Programming languages
• Computer algebra systems (listing) and automated matrix analysis
• statistics software (for example SPSS)
• SAS (programming language)
• R (programming language)