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Quotient Normed Vector Space

Last updated Nov 1, 2022

# Definition

Let $(X, ||\cdot||)$ be a Normed Vector Space and let $Y \subset X$ be a Closed Vector Subspace. Then we call the Quotient Vector Space $X / Y$ endowed with the Quotient Norm $||[\cdot]||$ Quotient Normed Vector Space.

# Remarks

  1. The requirement that $Y$ is Closed is very important. See Quotient Norm