Skip to main content
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Source Link

Is it possible to prove the non-completeness of the Borel-Lebesgue measure on $\mathbb{R}$ (restricted to the Borel $\sigma$-algebra) without the full axiom of choice, but still with Countable Choice ? It seems to be the case when I read Non-Borel sets without axiom of choiceNon-Borel sets without axiom of choice, but I was unable to really prove it.

Is it possible to prove the non-completeness of the Borel-Lebesgue measure on $\mathbb{R}$ (restricted to the Borel $\sigma$-algebra) without the full axiom of choice, but still with Countable Choice ? It seems to be the case when I read Non-Borel sets without axiom of choice, but I was unable to really prove it.

Is it possible to prove the non-completeness of the Borel-Lebesgue measure on $\mathbb{R}$ (restricted to the Borel $\sigma$-algebra) without the full axiom of choice, but still with Countable Choice ? It seems to be the case when I read Non-Borel sets without axiom of choice, but I was unable to really prove it.

Source Link
Michael
  • 361
  • 2
  • 8

Non-completeness of the Borel-Lebesgue measure and countable choice

Is it possible to prove the non-completeness of the Borel-Lebesgue measure on $\mathbb{R}$ (restricted to the Borel $\sigma$-algebra) without the full axiom of choice, but still with Countable Choice ? It seems to be the case when I read Non-Borel sets without axiom of choice, but I was unable to really prove it.