n class="w"> </span><span class="p">.</span><span class="nb">or</span><span class="p">.</span><span class="w">  </span><span class="p">(((</span><span class="n">alpha</span><span class="p">.</span><span class="n">eq</span><span class="p">.</span><span class="n">zero</span><span class="p">).</span><span class="nb">or</span><span class="p">.</span><span class="w"> </span><span class="p">(</span><span class="n">k</span><span class="p">.</span><span class="n">eq</span><span class="p">.</span><span class="mi">0<