deletions | additions       diff --git a/Introduction.tex b/Introduction.tex  index 46ae586..23d206c 100644  --- a/Introduction.tex  +++ b/Introduction.tex 
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j \cdot j =-1 \\  k \cdot k =-1 \\  ij=ji=0 i\cdot j=j\cdot i=0  \\ ik=ki=0 i\cdot k=k\cdot i=0  \\ jk=kj=0 j\cdot k=k\cdot j=0  \end{equation}  This is similar to having 3 independant imaginary numbers.