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Are there an results on functions annihilated by the n-times iterated Cauchy-Riemann operator ${\partial\over\partial\bar z}$, aka functions $f$ that for some $n\in\mathbb{N}$ satisfy the following equation? $${\partial^n f\over\partial\bar z^n}=0$$ EDIT: I have posted the same questions only a very short period of time ago, when my web browser suddenly froze and I didn't believe the question got posted successively, therefor posting it again here. If such repetition goes against any site rules or regulations, as I would suspect it does, may somebody in power to do so please remove one of the posts. Thank you!

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n-times iterated Cauchy-Riemann operator

Are there an results on functions annihilated by the n-times iterated Cauchy-Riemann operator ${\partial\over\partial\bar z}$, aka functions $f$ that for some $n\in\mathbb{N}$ satisfy the following equation? $${\partial^n f\over\partial\bar z^n}=0$$