On the Paper of Louis N. Howard and A. S. Gupta
Kailash Chandra · Journal of the Physical Society of Japan · 1973
The semicircle theorems obtained by Howard and Gupta are generalized. A sufficient condition for the stability and a semicircular region for the complex rate of growth of unstable modes are obtained with reference to the situation discussed by them in §6. The dual role of the uniform axial magnetic field is manifested.