where formula_3, and formula_10. Of the three possible cases for the relative values of formula_11 and formula_12, the case where formula_13 causes both formula_5 to be complex. This means the metric is regular for all positive values of formula_1, or in other words, the singularity has no event horizon. However, this corresponds to a case where formula_16 exceeds formula_17 (or in Planck units, , i.e. the charge exceeds what is normally viewed as the upper limit of its physically possible values.