title: Java/Scala library for algebra, mathematics
body: <p>Can you advise me some flexible and powerful, yet fast library which could cover SciPy (both in performance and functionality).  I found SciPy very expressive - but I want to try something in Scala.</p>
  
  <p>I read a little about Scala - but is not as featured as SciPy. Any alternatives? Maybe Java library?</p>