# Symbolic Quaternion Multiplication

It is possible to do the symbolic multiplication $$qq^*$$ of a quaternion $$q=a+bi+cj+dk$$ by its conjugate $$q^*=a-bi-cj-dk$$ using Mathematica? It seems that Quaternion package only works with numeric entries.

• Use ** instead of * to "multiply" 2 quaternions. – Carl Woll Nov 19 '18 at 17:19
• Try a new package named GTPack. – Αλέξανδρος Ζεγγ Nov 20 '18 at 2:53
• Thanks for all the relevant contributions! – robson denke Nov 28 '18 at 20:01

Needs["Quaternions"]
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