Description
Created in a decorative form, pythagorean sign symbolizing mathematical solution of things impossible or extremely difficult, like considered as such geometrical matters unable to be put in formulas and schemata. By writing in the circle various geometric figures, especially squares and triangles, it was tried to calculate for example sphere area or circle line length. More efficient methods were soon discovered but the figures remained as a symbol and represent solution of hopeless human problems, difficult matters and tough problems.
