Example exc-067

Prev: exc-066

Next: exc-068

a a0 a0 1

<math>
<apply><forall/>
  <bvar><ci>a</ci></bvar>
  <condition><apply><neq/><ci>a</ci><cn>0</cn></apply></condition>
  <apply><eq/>
    <apply><power/><ci>a</ci><cn>0</cn></apply>
    <cn>1</cn>
  </apply>
</apply>
</math>