Intuitively, what does q bar mean? You said it was a reflection, but across what axes?

kkzhang

How do we know that the cross product of the reflection of q and q is a rotation?

niyiqiul

For the operation q_bar, do we inverse every imaginary element of q?

Starboy

How can we determine the direction of the rotation here?

Joshua

Why do quaternions not have a gimbal-lock?

embl

Why do we multiply the x with the q and the q_bar? Is there a geometric meaning in this?

derk

Why do we need to multiply by q bar and what is the significance of q bar/ negating the imaginary component?

snaminen

How do we know that the quaternion cross product definition on the previous slide represents a rotation? Is there any geometric meaning that we can see from the formula?

ant123

What does q bar represent? How is this a rotation?

bobzhangyc

Why do we take Imaginary part of H out instead of the whole part of H?

Intuitively, what does q bar mean? You said it was a reflection, but across what axes?

How do we know that the cross product of the reflection of q and q is a rotation?

For the operation q_bar, do we inverse every imaginary element of q?

How can we determine the direction of the rotation here?

Why do quaternions not have a gimbal-lock?

Why do we multiply the x with the q and the q_bar? Is there a geometric meaning in this?

Why do we need to multiply by q bar and what is the significance of q bar/ negating the imaginary component?

How do we know that the quaternion cross product definition on the previous slide represents a rotation? Is there any geometric meaning that we can see from the formula?

What does q bar represent? How is this a rotation?

Why do we take Imaginary part of H out instead of the whole part of H?