This little guy craves the light of knowledge and wants to know why 0.999... = 1. He wants rigour, but he does accept proofs starting with any sort of premise.

Enlighten him.

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[–] Tomorrow_Farewell@hexbear.net 5 points 8 months ago (1 children)

The symbol 'i' is usually reserved for the imaginary unit.

[–] mathemachristian@hexbear.net 2 points 8 months ago

I've seen it used very frequently as a name for a variable, the imaginary unit i usually has a different typeface to distinguish the two is what Im accustomed to.