File:AsymptoticExpansionE1.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:30, 4 February 2008 | ![]() | 1,110 × 1,110 (49 KB) | Domitori | {{Information |Description=Divergence of the asymptotic series for the w:Exponential integral :<math>{\rm E}_1(z) = \int_1^\infty \frac{e^{-tz}}{t}\, dt,\qquad \Re(z) \ge 0~~.</math> The fincitons :<math> E_1(z,N)= \frac{\exp(-z)}{z} \sum_{n=0}^{N-1 |
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