Analysis of information sources in references of the Wikipedia article "Exponentiation" in English language version.
Et aa, ou a2, pour multiplier a par soy mesme; Et a3, pour le multiplier encore une fois par a, & ainsi a l'infini(And aa, or a2, in order to multiply a by itself; and a3, in order to multiply it once more by a, and thus to infinity).
Primum ergo considerandæ sunt quantitates exponentiales, seu Potestates, quarum Exponens ipse est quantitas variabilis. Perspicuum enim est hujusmodi quantitates ad Functiones algebraicas referri non posse, cum in his Exponentes non nisi constantes locum habeant.
A positive power of zero is infinitely small, a negative power of zero is infinite.