The hopf map in terms of quaternions is defined as h : r <mo stretchy="false">&#x21A6

Bruce Rosario

Bruce Rosario

Answered question

2022-04-30

The hopf map in terms of quaternions is defined as
h : r R r ( P 0 ) = r i r ¯
where r is a unit quaternion and P 0 = ( 1 , 0 , 0 ) is a fixed point. If a point r S 3 is sent by the Hopf map to the point P S 2 , a formula can be derived for a particular representation for the cosets. In my case, I want to derive a formula for the 180 rotations around an axes through i and other points in S 3 .

Answer & Explanation

gonzakunti2

gonzakunti2

Beginner2022-05-01Added 16 answers

Step 1
It's the same thing: if P = ( p 1 , p 2 , p 3 ) S 2 , then p 1 2 + p 2 2 + p 3 2 = 1 so ( 1 + p 1 ) 2 + p 2 2 + p 3 2 = 1 + 2 p 1 + p 1 2 + p 2 2 + p 3 2 = 2 + 2 p 1 . .

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