Tensor, the geometric tool of relativity

Tensors are used in mathematics and science to reveal hidden geometric truths. What are they? An article by Joseph Howlett. Original history reprinted with the permission of Quanta Magazine, an editorially independent publication supported by the Simons Foundation. Imprint: Michele Sclafani for Quanta MagazineAfter publishing his special theory of relativity in 1905, Albert Einstein dedicated the following decade to developing a theory of gravit…