amped"><span class="mord displaystyle textstyle uncramped"><span class="mord mathbf">e</span></span><span class="mopen">(</span><span class="mord mathit">φ</span><span class="mclose">)</span><span class="mrel">=</span><span class="minner displaystyle textstyle uncramped"><span class="style-wrap reset-textstyle textstyle uncramped" style="top:0em;"><span class="delimsizing size3">(</span></span><span class="mord"><span class="mtable"><span class="col-align-c"><span class="vlist"><span style="top:-0.60999999