mula" is a result of the author (the
      existence and definition of the exponential, on the octonions among others,
      on the other hand, is a few centuries old). Basically, any converging power
      series with real coefficients which allows for a closed formula in <span class="emphasis"><em><span class="bold"><strong>C</strong></span></em></span> can be transposed to <span class="emphasis"><em><span class="bold"><strong>O</strong></span></em></span>. More transcendentals of this type could
      be