--------------------  We say that the mapping $A:{\ensuremath{\mathcal H}}\rightrightarrows{\ensuremath{\mathcal H}}$ is monotone with modulus ${\ensuremath{\varphi}}:[0,\infty[\to[0,\infty]$ if for every two points $(x,u)$ and $(y,v)$ in ${\ensuremath{\operatorname{gra}}}A$, $$