Some articles on symmetry, reflection symmetry aligned:
... The figure shows all possible free heptominoes, coloured according to their symmetry groups 84 heptominoes (coloured grey) have no symmetry ... Their symmetry group consists only of the identity mapping. 9 heptominoes (coloured red) have an axis of reflection symmetry aligned with the gridlines ...
Famous quotes containing the words reflection and/or symmetry:
“In the last analysis, love is only the reflection of a mans own worthiness from other men.”
—Ralph Waldo Emerson (18031882)
“What makes a regiment of soldiers a more noble object of view than the same mass of mob? Their arms, their dresses, their banners, and the art and artificial symmetry of their position and movements.”
—George Gordon Noel Byron (17881824)