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iam_agf
iam_agf
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Poincaré Duality for non-compact manifolds without Zorn's Lemma

Does exists a proof of the Poincaré Duality version for non-compact manifolds without using the Zorn's Lemma? I know that there is a proof using the Whitney embedding theorem, but I don't know this theorem's proof, so I don't know if it uses the Zorn's Lemma too.

Poincaré Duality without Zorn's Lemma

Does exists a proof of the Poincaré Duality without using the Zorn's Lemma? I know that there is a proof using the Whitney embedding theorem, but I don't know this theorem's proof, so I don't know if it uses the Zorn's Lemma too.

Poincaré Duality for non-compact manifolds without Zorn's Lemma

Does exists a proof of the Poincaré Duality version for non-compact manifolds without using the Zorn's Lemma? I know that there is a proof using the Whitney embedding theorem, but I don't know this theorem's proof, so I don't know if it uses the Zorn's Lemma too.

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iam_agf
iam_agf
  • 203
  • 2
  • 7

Poincaré Duality without Zorn's Lemma

Does exists a proof of the Poincaré Duality without using the Zorn's Lemma? I know that there is a proof using the Whitney embedding theorem, but I don't know this theorem's proof, so I don't know if it uses the Zorn's Lemma too.