IJ=JK=KI=IJK=I^2=J^2=K^2=-1

IJ=JK=KI=IJK=I^2=J^2=K^2=-1

What could I, J and K be? If you don't answer it means all of maths since the 1840s is a fallacy and anyone who goes past arithmetic and calculus has been fooled.

>>1
I've seen a lot of silly grudges before, but a grudge against quaternions? Yikes.
Also, they're 2x2 complex matrices. I don't remember off the top of my head which each one is, but you can find that at mathworld if you want. Oh, and that -1 actually means -1*U where U is the 2x2 identity matrix.