Revision as of 20:45, 13 January 2020 edit 50.205.142.35 (talk) →Last section on 4D rotations needs rewriting: new section ← Previous edit		Revision as of 15:22, 19 May 2020 edit undo 80.47.47.163 (talk) →Compared to rotation matrices: new section Next edit →
Line 911: * And it is never mentioned which quaternions {{math\|'''z'''<sub>l</sub>}} and {{math\|'''z'''<sub>r</sub>}} must be used to achieve a desired rotation in 4-space, or what rotation is achieved using those '''z''''s. [[Special:Contributions/50.205.142.35\|50.205.142.35]] ([[User talk:50.205.142.35\|talk]]) 20:45, 13 January 2020 (UTC) == Compared to rotation matrices == The article says "Compared to rotation matrices they are more compact, more numerically stable, and more efficient" However, quaternion rotation requires 24 add/mul operations but a 3x3 matrix requires only 15 add/mul operations. Also, the "more numerically stable" claim is unjustified and I cannot find a reference.

Talk:Quaternions and spatial rotation: Difference between revisions