Figure 22.
The plot lists 5 cases. Case 1 has phi sub 1 equals 0, phi sub 2 equals 0, phi sub 3 equals 0, and phi sub 4 equals 0. Case 2 has phi sub 1 equals 0.02, phi sub 2 equals 0, phi sub 3 equals 0, and phi sub 4 equals 0. Case 3 has phi sub 1 equals 0.02, phi sub 2 equals 0.02, phi sub 3 equals 0, and phi sub 4 equals 0. Case 4 has phi sub 1 equals 0.02, phi sub 2 equals 0.02, phi sub 3 equals 0.02, and phi sub 4 equals 0. Case 5 has phi sub 1 equals 0.02, phi sub 2 equals 0.02, phi sub 3 equals 0.02, and phi sub 4 equals 0.02. The horizontal axis is xi and ranges from 1.0 to slightly above 2.0. The vertical axis is R e raised to minus 1 over 2 N u and ranges from minus 4 to above 4. The curves begin near 1.4 at xi 1.0, oscillate with increasing amplitude, and end with a steep drop near the right edge. Peaks rise above 4 near xi about 2.0, while troughs fall below minus 3 near the right side. An arrow points from the case numbers toward the curve group near xi about 1.3.Variations of on