导出函子 Derived functor
（重定向自Left derived functor）
在同调代数中，阿贝尔范畴间的某类函子可以「求导」，以获得相应的导出函子。此概念可以融贯数学中许多领域里的具体构造。
Left derived functor
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Derived functor 导出函子
（重定向自Left derived functor）
![](/Images/godic/202501/23/Two_long_exact_sequences4220.png")
![](/Images/godic/202501/23/Two_long_exact_sequences24220.png")
In mathematics, certain functors may be derived to obtain other functors closely related to the original ones. This operation, while fairly abstract, unifies a number of constructions throughout mathematics.
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- economic criteria
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- economic cruise speed
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- economic current
- economic current density
- economic curve
- economic cybernetics
- Economic cycle
- Economic cycles
- economic cycle theory
- economic cyclical changes
- economic daily
- Economic data
- economic decision
- economic decision making
- economic decisions