# Complex number/Related Articles

From Citizendium, the Citizens' Compendium

*See also changes related to Complex number, or pages that link to Complex number or to this page or whose text contains "Complex number".*

## Parent topics

- Number [r]: One of the fundamental concepts of mathematics, used for such purposes as counting, ordering, and measuring.
^{[e]} - Quaternions [r]: Numbers of form a + bi + cj + dk, where a, b, c and d are real, and i
^{2}= −1, j^{2}= −1 and k^{2}= −1.^{[e]}

## Subtopics

- Real number [r]: A limit of the Cauchy sequence of rational numbers.
^{[e]} - Transcendental number [r]: A number which is not algebraic: that is, does not satisfy any polynomial with integer or rational coefficients.
^{[e]} - Algebraic number [r]: A complex number that is a root of a polynomial with rational coefficients.
^{[e]} - Gaussian integer [r]: A number of the form
*a*+*b*i, where*a*and*b*are integers.^{[e]}

- Complex analysis [r]: Field of mathematics, precisely of mathematical analysis, that studies those properties which characterize functions of complex variables.
^{[e]} - Fundamental Theorem of Algebra [r]: Any nonconstant polynomial whose coefficients are complex numbers has at least one complex number as a root.
^{[e]} - Argand diagram [r]:
*Add brief definition or description*