The peacock, the pillar and a theorem: How ancient Indian scholars knew the triangle rule before Pythagoras

Let's explore how the Pythagorean theorem was known and applied in India centuries before Pythagoras, highlighting a poetic ...
Nature

Elementary Theorems Relating to the Geometry of a Space of Three Dimensions, and of Uniform Positive Curvature in the Fourth Dimension

THIS is an interesting contribution to the subject treated of by Riemann, Helmholtz, and others, and in this country by Prof. Clifford. The question is considered from the standpoint of elementary ...