title: Applying dyadic function on pairs from two lists
body: <p>Suppose I have a dyadic function <code>f[x;y]</code>, and two lists</p>
  <pre><code>l1: a1 a2 a3 ...
  l2: b1 b2 b3 ...
  </code></pre>
  <p>In KDB, how can I get</p>
  <pre><code>f[a1;b1] f[a2;b2] f[a3;b3] ... 
  </code></pre>
  <p>?</p>