Category:Equivalence of Definitions of Removable Discontinuity of Real Function
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This category contains pages concerning Equivalence of Definitions of Removable Discontinuity of Real Function:
Let $A \subseteq \R$ be a subset of the real numbers.
Let $f: A \to \R$ be a real function.
Let $f$ be discontinuous at $a \in A$.
The following definitions of the concept of removable discontinuity are equivalent:
Definition 1
The point $c$ is a removable discontinuity of $f$ if and only if the limit $\ds \lim_{x \mathop \to c} \map f x$ exists.
Definition 2
The point $c$ is a removable discontinuity of $f$ if and only if there exists $b \in \R$ such that the function $f_b$ defined by:
- $\map {f_b} x = \begin {cases} \map f x &: x \ne c \\ b &: x = c \end {cases}$
is continuous at $c$.
Pages in category "Equivalence of Definitions of Removable Discontinuity of Real Function"
The following 2 pages are in this category, out of 2 total.