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→References: cite Holladay |
→The derivative for quaternions: Fixed bad Engish |
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is [[linear map]] of quaternion algebra <math>\mathbb H</math> and
<math>o:\mathbb H\rightarrow \mathbb H</math>
is
: <math>\lim_{a\rightarrow 0}\frac{|o(a)|}{|a|}=0</math>
The linear map
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