6 Exponential, Logarithmic, Sine, and Cosine IntegralsProperties6.3 Graphics
Figure 6.3.3 (See in context.) 3D Help
See accompanying text
Figure 6.3.3: |E1⁡(x+i⁢y)|, −4≤x≤4, −4≤y≤4. Principal value. There is a cut along the negative real axis. Also, |E1⁡(z)|→∞ logarithmically as z→0. 3D Help