Quaternion with only two imaginary numbers
42493
Why is quaternion algebra 4d and not 3d?
127799
Eigenvalues of symmetric matrices are real without (!) complex numbers
77909
Two axes for rotational motion
122181
Application of Complex Numbers
83359
Complex number identity by trigonometry
74827
Integer ordered pair of $(x,y)$ in complex algebraic equation
92647
How do I compute the principal values of these complex numbers
141610
Can Euler's identity be extended to quaternions?
125719
Multiplicative inverse of a complex number.
143123
finding an argument of a complex number
75481
Switch axes and handedness of a quaternion?
4116
If we are handed the presentation $\langle i,j,k \mid i^2=j^2=k^2=ijk \rangle$ and nothing more, can we deduce that this is the quaternion group?
10699
Why are There No "Triernions" (3-dimensional analogue of complex numbers / quaternions)?
139162
Complex number isomorphic to certain $2\times 2$ matrices?
114258
Stuff which squares to $-1$ in the quaternions, thinking geometrically.
80616
A ring with few invertible elements
93116
How to raise a number to a quaternion power