submitted 4 months ago by Tomorrow_Farewell@hexbear.net to c/chapotraphouse@hexbear.net

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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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[-] Xavienth@lemmygrad.ml 3 points 4 months ago

Using i as an index 🤮

[-] mathemachristian@hexbear.net 6 points 4 months ago

? Thats pretty standard though right?

[-] dat_math@hexbear.net 6 points 4 months ago* (last edited 4 months ago)

in computer programs, yes

not so much in analysis

[-] mathemachristian@hexbear.net 3 points 4 months ago* (last edited 4 months ago)

I'm seeing n and i used as variables in Rudin, predominantly n though, but Im accustomed to n being a constant.

[-] Tomorrow_Farewell@hexbear.net 5 points 4 months ago

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

[-] mathemachristian@hexbear.net 2 points 4 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.