A grid or "matrix" of numbers (Stress, Conductivity). It describes how multiple directions interact.
Vector derivatives that tell you how fields "slope," "spread," or "spin." Introduction to Vector and Tensor Analysis
), tensor calculus gives you a foolproof recipe to calculate them in any other system (like spherical or curved coordinates). A grid or "matrix" of numbers (Stress, Conductivity)
A shorthand notation that makes massive, terrifying equations look elegant and manageable. " or "spin." )