title: Regular expression to validate csv line that contains integer ranges in ascending order
body: <p>Let's say we have ranges</p>
  
  <ul>
  <li>&lt;0,100> </li>
  <li>(100,1000></li>
  <li>(1000,10000></li>
  <li>(10000,infinity)</li>
  </ul>
  
  <p>expressed as csv line as follows: </p>
  
  <p><strong>0,100;100,1000;1000,10000;10000</strong></p>
  
  <p>What is the regular expression which will validate that csv line contains integer ranges in ascending order?</p>