Epsilon-Neighborhood (Real Number Line)/Examples/1-Neighborhood of 2

From ProofWiki
Jump to navigation Jump to search

Examples of Epsilon-Neighborhoods

The $1$-neighborhood of $2$ is the set:

$\map {N_1} 2 = \openint 1 3 = \set {x \in \R: \size {x - 2} < 1}$


Sources