Orthogonal involution, also called absolute involution, is the involution on the line at infinity that maps orthogonal directions to each other.

# Orthogonal Involution

## See also

Involution, Line at Infinity
*This entry contributed by Floor
van Lamoen*

## Explore with Wolfram|Alpha

## Cite this as:

van Lamoen, Floor. "Orthogonal Involution." From *MathWorld*--A Wolfram Web Resource, created by Eric
W. Weisstein. https://mathworld.wolfram.com/OrthogonalInvolution.html