About: Whitehead problem

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The problem of whether an abelian group 𝐴 satisfying Ext¹(𝐴,ℤ)=0 is necessarily free, now known to be independent of ZFC

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  • la problemo, ĉu ĉiu komuta grupo 𝐴 tia ke Ext¹(𝐴,ℤ)=0 estas libera komuta grupo, kio estas ne pruvebla nek malpruvebla per la aksiomoj de ZFC (eo)
  • problem, ali je abelijanska grupa 𝐴, ki izpolnjuje Ext¹(𝐴,ℤ)=0, nujno prosta; zdaj je znano, da je neodvisna od ZFC (sl)
  • the problem of whether an abelian group 𝐴 satisfying Ext¹(𝐴,ℤ)=0 is necessarily free, now known to be independent of ZFC (en)
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  • Eklof, P.C. (en)
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  • W/w110030 (en)
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  • Whitehead problem (en)
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  • Whitehead problem (en)
  • 화이트헤드 문제 (ko)
  • 怀特海问题 (zh)
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