  Let $AP_k=\{a,a+d,\ldots,a+(k-1)d\}$ be an arithmetic progression. For
$\epsilon>0$ we call a set $AP_k(\epsilon)=\{x_0,\ldots,x_{k-1}\}$ an
$\epsilon$-approximate arithmetic progression if for some $a$ and $d$,
$|x_i-(a+id)|<\epsilon d$ holds for all $i\in\{0,1\ldots,k-1\}$. Complementing
earlier results of Dumitrescu, in this paper we study numerical aspects of Van
der Waerden, Szemeredi and Furstenberg-Katznelson like results in which
arithmetic progressions and their higher dimensional extensions are replaced by
their $\epsilon$-approximation.
