beginfig(2); u := 1cm; path p; % Koordinatensystem z0=(0,0); z1=(5u,-u); z2=(3u,2u); drawarrow z0--(0,4u); drawarrow z0--z1; drawarrow z0--z2; % die Gebietsprojektion p = (2.4u,0.4u){0,-1}..(3.3u,0.4u)..(4.6u,0.3u)..{0,1}(5.9u,0.5u){0,1}.. (3.8u,1.2u)..cycle; fill p withcolor 0.9white; draw p; drawarrow (6u,0.2u)--(5u,0.5u); label.lrt(btex $B$ etex,(6u,0.2u)); % der Erdapfel draw (2.4u,3u)..(4.5u,2.7u)..(5.9u,3.4u)..(4.5u,4.6u).. (3.8u,4.3u)..(3.2u,4.1u)..cycle; drawarrow (3u,5u)--(4u,4u); label.ulft(btex $V$ etex,(3u,5u)); % finde nun y-achsenparalle Linien whatever[z2,z0] + m[z1,z0] = (2.4u,.4u); whatever[z2,z0] + o[z1,z0] = (5.9u,.3u); draw (2.4u,3u)--(2.4u,.4u)--(m[z1,z0]) dashed evenly; draw (5.9u,3.4u)--(5.9u,0.3u)--(o[z1,z0]) dashed evenly; label.llft(btex $x_u$ etex,m[z1,z0]); label.llft(btex $x_o$ etex,o[z1,z0]); label.bot(btex $f(x)$ etex,(4u,0.3u)); label.top(btex $g(x)$ etex,(4.3u,1.3u)); endfig; end;