April 11 – 101

KnotPlot. Sand-knot – or the Borromean knot. In mathematics, the Borromean knot is composed of three rings linked in such a way that no two alone are connected. The name “Borromean” comes from its use in the coat of arms of the Borromeo family in Northern Italy. It has been used in in religion and art to indicate strength in unity. Psychoanalyst Jacques Lacan used it as a model for his topology of human subjectivity: the real, the imaginary and the symbolic.