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# A: List of Symbols

$$\epsilon$$    "Is an element of".

$$\sim$$    "Is equivalent to", see equivalence relations.  Also "is row equivalent to" for matrices.

$$\mathbb{R}$$    The real numbers.

$$I_{n}$$    The $$n \times n$$ identity matrix.

$$P_{n}^{\mathbb{F}}$$    The vector space of polynomials of degree at most $$n$$ with coeficients in the field $$\mathbb{F}$$.

$$\mathbb{M}_{k}^{r}$$    The vector space of $$r \times k$$ matrices.