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#2: Post edited
- If I understand the situation correctly, the problematic issue is the zero rotation, and the issue is that if you do not rotate things at all, than that corresponds to a zero rotation around any axis.
- If this is true, then I could understand any of your three ideas. The third one might be marginally harder to read because of the spacing, but that can be dealt with; it is typography, not mathematics.
In idea two you might want to add the curly braces as in the two others, or otherwise the word «or» where appropriate.- But generally, I would use whichever is clearest and uses as similar notations as you use for similar ideas in the rest of the text.
- If I understand the situation correctly, the problematic issue is the zero rotation, and the issue is that if you do not rotate things at all, than that corresponds to a zero rotation around any axis.
- If this is true, then I could understand any of your three ideas. The third one might be marginally harder to read because of the spacing, but that can be dealt with; it is typography, not mathematics.
- In idea two you might want to add the word «or».
- But generally, I would use whichever is clearest and uses as similar notations as you use for similar ideas in the rest of the text.
#1: Initial revision
If I understand the situation correctly, the problematic issue is the zero rotation, and the issue is that if you do not rotate things at all, than that corresponds to a zero rotation around any axis. If this is true, then I could understand any of your three ideas. The third one might be marginally harder to read because of the spacing, but that can be dealt with; it is typography, not mathematics. In idea two you might want to add the curly braces as in the two others, or otherwise the word «or» where appropriate. But generally, I would use whichever is clearest and uses as similar notations as you use for similar ideas in the rest of the text.