Talk:Quaternionic projective space
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Lack of commutativity
Homogeneous coordinates and linear transformations need special attention in the non-commutative context of quaternions. See projective line over a ring for an approach using left multiplication to define the points with homogeneous coordinates, and matrix products on the right to provide the projectivities. — Rgdboer (talk) 22:14, 5 May 2019 (UTC)