title: Efficiently check if numpy ndarray values are strictly increasing
body: <p>I'm having a numpy ndarray where I would like to check if each row vector is monotonically increasing.</p>
  
  <p>Example:</p>
  
  <pre><code>a = np.asarray([[1,2,3],[1,5,7],[4,3,6]])
  monotonically_increasing(a)
  </code></pre>
  
  <p>Expected return:</p>
  
  <pre><code>[True, True, False]
  </code></pre>
  
  <p>I'm not entirely sure how to efficiently do this, since the matrices are expected to be quite large (~1000x1000), and was hoping for some help.</p>