REMIS: The Davenport-Heintz Example
Description of the problem on p.325: This formula is a special case
of more general formula used by Davenport and Heintz in order to
show the time complexity of the quantifier elimination in elementary
algebra and geometry.
also in Loos & Weispfenning
davhei := ex(c,all({a,b},(a=d and b=c) or (a=c and b=1) impl a**2 = b));
end; % of file