Knot Theory
A knot is called achiral if it can be continuously deformed into its mirror image, otherwise it is called chiral. For example the unknot and the figure-eight knot are achiral, whereas the trefoil knot is chiral.
Read more about this topic: Chirality (mathematics)
Famous quotes containing the words knot and/or theory:
“I love him who does not want to have too many virtues. One virtue is more virtue than two, since it is more knot on which to hang the rope that is destined to hang him.”
—Friedrich Nietzsche (1844–1900)
“The human species, according to the best theory I can form of it, is composed of two distinct races, the men who borrow and the men who lend.”
—Charles Lamb (1775–1834)