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CHINESEBOTTROLL ,
@CHINESEBOTTROLL@sh.itjust.works avatar

I guess it depends on the place. But the arguments for not including seem futile, when

  • we use 0 to even write the other natural numbers
  • we define almost all of our algebraic objects (groups, rings/fields, modules/vector spaces, algebras) to include 0
  • we don’t do modular arithmetic with {1,…,n} that would be crazy

Of course 0 vs no 0 only matters if you actually do arithmetic with it. If you only index you could just as well start with 5.

(The only reasons I can think of to start at 1 is that 1 is the 1-st element then and the sequence (1/n) is defined for all natural n)

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