Definition:Root
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Root may refer to:
- Analysis:
- Root of a number: If $y^m = x$ then $x = \sqrt [m] y$, and $x$ is the $m$th root of $y$.
- Root of an equation: The roots of an equation $E$ are the values of the variables for which $E$ is true.
- Root of a mapping (or function): The roots of a mapping $f$ are the values of $x$ for which $\map f x = 0$.
- Root of a polynomial: the roots of a polynomial $f$ are the values of $x$ for which $\map f x = 0$.
- Graph Theory
- Root Node: A rooted tree is a tree which has a particular node distinguished from the others and called the root node, or just root.
- Mathematical Logic
- Root of a propositional tableau: The root of a propositional tableau $T$ is its hypothesis set $\mathbf H$, which is considered to be attached to the root node of $T$.