My teacher was saying that we cant have a set of infinitely decreasing natural numbers.(adsbygoogle = window.adsbygoogle || []).push({});

What if we started at ω and then worked our way backwards. I realize that is ill defined.

And where ever we start will be a finite number. But if we can have an infinitely increasing set in the natural numbers, why cant we just run this backwards.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Question about the natural numbers?

**Physics Forums | Science Articles, Homework Help, Discussion**