Hello, i have heard tat you can use Borel transform in QM so the divergent perturbation series become convergent.. i am a bit confused since if you must compute the Borel transform:(adsbygoogle = window.adsbygoogle || []).push({});

[tex] B(x)=\sum_{n=0}^{\infty}\frac{a(n)x^{n}}{n!} [/tex]

But this can only be made for a few cases [tex] a(n)=(-1)^{n} [/tex] and

[tex] a(n)=(-1)^{n} n! [/tex]

But if the a(n) don't follow a known pattern Borel Transform is useless..:grumpy: :grumpy:

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# Understanding Borel transform (sum) in QM

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