n class="sd">      True when equivalent, False otherwise.</span>

<span class="sd">    Examples:</span>
<span class="sd">    &gt;&gt;&gt; depth.is_equiv(longitude) # generally different directions.</span>
<span class="sd">    False</span>

<span class="sd">    See also:</span>
<span class="sd">      make_equiv</span>
<span class="sd">      eq_index</span>
<span class="sd">      eq_in</span>
<span class="sd">    &quot;&quot;&quot;</span>
    
<span class="c">#    if (other in self.equivs) | (self in other.eq