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回复 kuing
限制要怎么写?就是函数$f(x)$定义在区间$[0,2]$上,当它限制在$E=[0,1]$上时那个,像这样的$f|_{E}(x)=x^2$。
abababa 发表于 2021-7-7 15:23
In mathematics, the restriction of a function $f$ is a new function, denoted $f\vert_A$ or $f {\restriction_A}$, obtained by choosing a smaller domain $A$ for the original function $f$.
The function $f$ is then said to extend $f\vert_A$.
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