Mathematical notation

Notation to follow in scikit-fda documentation and related publications, if possible:

Data types

• Scalars: in lowercase, like $x$.
• Vectors: in bold and lowercase, like $\mathbb{x}$.
• Matrices: in bold and uppercase, like $\mathbb{X}$.
• Functions: in lowercase, like $x$.
• Random variables, random vectors, stochastic processes: in uppercase, like $X$.