en.wikipedia.org/wiki/Number

A number is a mathematical object used to count, measure, and label. The
original examples ... For example, in Western society the number 13 is regarded
as unlucky, and "a ... Today, number sys...

www.theguardian.com/notesandqueries/query/0,5753,-18864,00.html

Complex numbers (the sum of real and imaginary numbers) occur quite naturally
in the study of quantum physics. They're useful for modelling periodic motions ...

www.math.toronto.edu/mathnet/questionCorner/complexinlife.html

After teaching complex numbers, my students have asked me the obvious
question: Where is this math used in real life! Your assistance would be greatly ...

www.math.toronto.edu/mathnet/answers/relevance.html

Sep 1, 1997 ... What relevance do imaginary numbers have to the real world? ... The "complex
numbers" that make up this system are pairs of numbers; do ...

mathforum.org/library/drmath/sets/select/dm_imaginary.html

Imaginary Numbers in Real Life, a selection of answers from the Dr. Math ... of
Imaginary Numbers: Where are imaginary numbers used today in real life, as in ...

plus.maths.org/content/101-uses-quadratic-equation-part-ii

May 1, 2004 ... Differential equations are at the heart of nearly all modern ... and this is the
approach generally used for the very complex differential equations .... Using a
combination of real and imaginary numbers, known as complex ...

www.albany.edu/news/12316.php

... appearance in many other areas of mathematics, such as complex numbers (
obtained by introducing the square root ... Q: How is Pi relevant to society today?

www.commsp.ee.ic.ac.uk/~mandic/complexbook/files/c01.pdf

The notion of complex number is intimately related to the Fundamental Theorem
of Algebra ... The human idea of 'number' has evolved together with human
society. ... N) are straightforward to accept, and they have been used for counting
in many ... mathematicians were working on what is today known as the
Fundamental ...

www.britannica.com/topic/modern-algebra

Sep 6, 2012 ... In itself a set is not very useful, being little more than a well-defined collection of
.... (An algebraic integer is a complex number satisfying an algebraic .... to the
features of society and culture that decisively distinguish humans.

work.chron.com/careers-use-complex-numbers-29845.html

Complex numbers have both a real number element and an imaginary number
element, usually in the form a + bi. In this form, a and b are real numbers, while i ...