The diagram above represents a vector. The arrow displays its direction, hence this vector can be written as \(\overrightarrow {AB}\), a, or \(\begin{pmatrix} 3 \\ 4 \end{pmatrix}\). In print ...

Our opening quote contended that Venn diagrams are overrated. Even those who agree must admit that they have a curious allure. Take the sets of interesting topics in logic, in geometry and in ...