In mathematics, the Ext functors of homological algebra are derived functors of Hom functors. They were first used in algebraic topology, but are common in many areas of mathematics.

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  • In mathematics, the Ext functors of homological algebra are derived functors of Hom functors. They were first used in algebraic topology, but are common in many areas of mathematics.
  • 在同調代數中，Ext 函子是 Hom 函子的導函子。此函子首見於代數拓撲，但其應用遍佈許多領域。
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  • In mathematics, the Ext functors of homological algebra are derived functors of Hom functors. They were first used in algebraic topology, but are common in many areas of mathematics.
  • 在同調代數中，Ext 函子是 Hom 函子的導函子。此函子首見於代數拓撲，但其應用遍佈許多領域。
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  • Ext functor
  • Ext函子
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