title: Is floating point arithmetic stable?
body: <p>I know that floating point numbers have precision and the digits after the precision is not reliable.</p>
  
  <p>But what if the equation used to calculate the number is the same? can I assume the outcome would be the same too?</p>
  
  <p>for example we have two float numbers <code>x</code> and <code>y</code>. Can we assume the result <code>x/y</code> from machine 1 is exactly the same as the result from machine 2? I.E. <code>==</code> comparison would return true</p>