Hyperplanes of finite-dimensional normed spaces with the maximal relative projection constant

Tomasz Kobos

The \emph{relative projection constant} $\lambda (Y,X)$ of normed spaces $Y\subset X$ is defined as $\lambda (Y,X)=\inf \{||P||:P\in \mathcal{P}(X,Y)\}$, where $\mathcal{P}(X,Y)$ den…