In general I'm wondering if(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\lim_{x\to0} \left[\frac{d}{dy} \frac{d}{dx} f(x,y)\right] = \frac{d}{dy} \left[\lim_{x\to0} \frac{d}{dx} f(x,y)\right][/tex]

holds true for allf(x,y).Thanks.

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# I Do limit and differential operators commute?

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