preservingly en · ADV
Etymology
From preserving + -ly.
Meanings
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(not-comparable) Whilst preserving some quantity or quality
If a finite group acts topologically, faithfully and orientation preservingly on R^3, then it is isomorphic to a subgroup of SO(3)..
2016, Slawomir Kwasik, Fang Sun, “Topological Symmetries of R^3”, in arXiv: