e/Ext functor

Information
has gloss	eng: 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.
lexicalization	eng: Ext functor
instance of	(noun) an operation that follows the rules of Boolean algebra; each operand and the result take one of two values binary arithmetic operation, boolean operation, binary operation

Meaning
German
lexicalization	deu: Ext
Chinese
has gloss	zho: 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。
lexicalization	zho: Ext函子

Media
media:img	EquivalenceOfExtensions.png