oor(), gauss(), gcd(), hypot(), int(), isnan(), j0(), j1(), jinc(), ln(), log(), logtwo(), max(), min(), mod(), not(), pow(), rand(), round(), sign(), sin(), sinc(), sinh(), sqrt(), squish(), tan(), tanh(), trunc()</dd>
  <dt class="col-md-4"> channel functions: </dt>
    <dd class="col-md-8"> define up to 5 pixel channels</dd>
  <dt class="col-md-4"> color names:</dt>
    <dd class="col-md-8"> red, cyan, black, etc.</dd>
  <dt class="col-md-4"> color functions:</dt>
    <dd class="col-md-8"> srgb(), srgba(