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Also in the description of "In fact, the composition zy represents a single rotation of 180 degrees about the [-1 1 0] axis", does that imply from [0 0 0] to [-1 1 0] ? I assume so, as otherwise I don't understand how an axis can be defined by a single point:) .. Unless it's more "understood" math terminology that I'm not familiar with :)
[[User:Mike Stramba|Mike Stramba]] 17:19, 2 December 2006 (UTC)
:Conventionally, an axis is represented by a unit vector (magnitude 1), such as the above mentioned [-1 1 0], so your assumption is correct. Btw, in two-dimensional space, a rotation axis is actually defined by a point. – [[User:AdrianLozano|Adrian Lozano]] 08:02, 4 December 2006 (UTC)
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