title: Python pulp optimizer with min absolute value
body: <p>I'm using pulp (<a href="https://pythonhosted.org/PuLP/" rel="nofollow">https://pythonhosted.org/PuLP/</a>) for optimization purposes and get issue. I need to use constraint like <code>abs(x) &gt; MIN</code> and I found solution here <a href="http://lpsolve.sourceforge.net/5.5/absolute.htm" rel="nofollow">http://lpsolve.sourceforge.net/5.5/absolute.htm</a>, I just create two constraints:</p>
  
  <pre><code>x + M * B &gt;= MIN
  -x + M * (1 - B) &gt;= MIN
  </code></pre>
  
  <p>Where B is 0 or 1 and M big enough value. The problem is that when I use M ~ 10000 everything works great, but when I use INT_MAX_VALUE or ~ 10000000000 it doesn't work.
  Have anyone get issues like this?</p>