unction8.png"> 
       Define the set using YALMIP <pre class="programlisting"> x = sdpvar(2,1); Set = YSet(x, [norm(x)&lt;=1]); </pre>
<pre class="programlisting"></pre> Define the functions<pre class="programlisting"> f1 = Function(@(x) sqrt(x(1)^2+x(2)^2+1)); f2 = Function(@(x) (x(1)-2)/(x(2)+3)); </pre>
<pre class="programlisting"></pre> Add these functions to the circle <tt>Set</tt> 
      <pre class="programlisting"> Set.addFunction(f1, 'polynomial')</pre>
<pre class="programlisting">YALMIP set in dim