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bananaflagyesterday at 8:09 PM4 repliesview on HN

And why would R be "entitled" to an algebraic closure?

(I have a math degree, so I don't have any issues with C, but this is the kind of question that would have troubled me in high school.)


Replies

seba_dos1today at 1:39 AM

Why would N be entitled to it? We made up negative numbers and more just to have a closure. You just learn about them at an age when you don't question it yet.

sreanyesterday at 9:13 PM

When it doesn't, we yearn for something that will fill the void so that it does. It's like that note you yearn for in a musical piece that the composer seems to avoid. One yearns for a resolution of the tension.

Complex numbers offers that resolution.

BigTTYGothGFyesterday at 11:40 PM

> And why would R be "entitled" to an algebraic closure?

It's the birthright of every field.

alexey-salminyesterday at 8:14 PM

The good news is that Q is not really entitled to a closure either.