conjugate
(also denoted z) is equal to x−yi. As a point in the complex plane 
represents the mirror image of z in the real axis. The complex conjugate satisfies,
and so complex conjugation is a field automorphism of ℂ. Other identities include
It is an important fact that if the complex number α is a root of a polynomial equation
where a1,…, an are real, then 
is also a root of this equation.
- div
- diverge
- divergence
- divergence theorem
- divides
- divisible
- division
- division
- division algebra
- Division Algorithm
- division ring
- divisor
- divisor function
- divisor of zero
- dodecagon
- dodecahedron
- Dodgson, Charles Lutwidge
- domain
- domain
- domain
- dominated convergence theorem
- Donaldson, Simon
- dot
- dot product
- double dummy