I suggest to add a tag (yes-or-no), used for question that are meant to receive a Yes/No answer, without need of further explanation. The standard question of this tag could be of the form "Is this fact/implication true?"

General introduction These tags (and some other similar ones) are known as "meta-tags": they describe certain aspects of the question that are independent of the mathematical subject the question is about, and they provide some information about what kinds of answer are sought. Their use is cons...

In progress A lot of questions need manual retagging, and the tag adjoint needs renaming The tag adjoint is "[f]or questions about adjoints, in the category-theoretic or inner-product-space sense, as well as about adjugate matrices", which certainly falls under "two or more completely unrela...

Suppose we have a particle which starts from a point $A$ and moves with constant speed $u$ along the line $AB$. One wants to show that the position vector $\mathbf{x}$ of the particle at time $t$ is $$\mathbf{x}=\mathbf{a}+ut\frac{\mathbf{b}-\mathbf{a}}{|\mathbf{b}-\mathbf{a}|},$$ where $\mathbf...