Definition:Polynomial in Ring Element/Definition 1
Jump to navigation
Jump to search
Definition
Let $R$ be a commutative ring.
Let $S$ be a subring with unity of $R$.
Let $x \in R$.
A polynomial in $x$ over $S$ is an element $y \in R$ for which there exist:
- a natural number $n \in \N$
- $a_0, \ldots, a_n \in S$
such that:
- $y = \ds \sum_{k \mathop = 0}^n a_k x^k$
where:
- $\ds \sum$ denotes indexed summation
- $x^k$ denotes the $k$th power of $x$
Also see
Sources
- 1978: Thomas A. Whitelaw: An Introduction to Abstract Algebra ... (previous) ... (next): $\S 64$. Polynomial rings over an integral domain