If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to the y-axis intersects with the values in the function’s curve only once. The same ...

On a non-compact, smooth, connected, boundaryless, complete Riemannian manifold (M,g), some ideal boundary elements could be defined by rays (or equivalently, by Busemann functions). From the ...

Components which show I–V graphs that are not straight lines are non-linear circuit elements. The current through them is not directly proportional to the potential difference across them. Thermistors ...