Subtracting a vector is the same as adding a negative version of the vector (remember that making a vector negative means reversing its direction). \(\left( \begin{array}{l} a\\ b \end{array} \right) ...

Any vector can be expressed as a sum of a number of other vectors. The vectors which are summed are called the components of the original vector. When you want to add and subtract two dimensional ...

We had another conversation today that reopens issue #412 (implemented by PR #413). When adding/subtracting vectors of different spatial/momentum dimensions—i.e. 2D vs 3D vs 4D, not array shape—there ...