### Biography

Attia Abdel Salam Ashour, Egyptian mathematician and geophysicist (Dumyat/Damietta 13 September 1924 – Cairo 17 April 2017)

One of the few world experts on the mathematical theory of electromagnetic induction

Showed that any current distribution in the ionospheric shell tends to rotate about the magnetic dipole axis

With V.C.A. Ferraro. Induction of electric currents in a uniform anisotropic ionosphere. Nature 196 (4851):260, 1962

### SOME BIBLIOGRAPHY

With M.S. Abou-Dina. Exact solutions for certain two-dimensional problems of induction in thin non-uniform sheets. Geophys. Res. 95:17547-53, 1990

With M.S. Abou-Dina. A general method for evaluating the current system and its magnetic field of a plane current sheet, uniform except for a certain area of different uniform conductivity with results for a square area. Il Nuovo Cimento 12C (15):304-11, 1989

The magnetic field of an infinite plane current sheet uniform except for two circular insertions of different conductivity. Geophys. J. Roy. Astron. Soc. 83:127-42, 1985

With R.C. Hewson-Browne, V.C.L. Hutson & P.C. Kendall. Magnetic field reversals in a shelving ocean. Geophys. J. Roy. Astron. Soc. 37(3):527-31, 1974

Theoretical models for electromagnetic induction in the oceans. Phys. Earth Planet Int. 7:303-12, 1973

Exact solutions for certain AXI-symmetric problems of induction in thin non-uniform sheets (1973)

With S.S. Doss. Some results on the magnetic field of electric currents induced in a thin hemispherical shell of finite conductivity with geomagnetic applications. Roy. Astron. Soc. Geophys. J. 22(4):385-400, 1971

Electromagnetic induction in thin finite sheets having conductivity decreasing to zero at the edges with geomagnetic applications. Geophys. J. Roy. Astron. Soc. 22(4):417-43, 1971 & 25:447-67, 1971

The magnetic field of a plane current sheet with different uniform conductivities in different part with result for an elliptic area. Geophys. J. Roy. Astron. Soc. 22(4):401-16, 1971

The depth variation of the intensity of current induced in a model Earth and ocean. Geophys. J. Roy. Astron. Soc. 17(3):321-5, 1969

The effect of the Earth’s conductivity on ionospheric shielding. Z. Geophys. 35:269-76, 1969

With S. Chapman. Meteor geomagnetic effects. Smithsonian Contrib. Astrophys. 8:181-97, 1965

Fourier series expansion for the general power of the distance between two points. J. Math. Phys. 6:492, 1965

Electromagnetic induction in finite thin sheets. Quart. J. Mech. Appl.Math 18:73-86, 1965

The coast-line effect on rapid geomagnetic variations. Roy. Astron. Soc. Geophys. J. 10(2):147-61, 1965

With S. Chapman. The magnetic field of electric currents in an unbounded plane sheet, uniform except for a circular area of different uniform conductivity. Roy. Astron. Soc. Geophy. J. 10(1):31-44, 1965

With A.T. Price. Night-time earth currents associated with the daily magnetic variations. Roy. Astron. Soc. Geophys. J. 10(1):1-15, 1965

Note on the relations between series equations and integral equations (1965)

On some formulae for integrals of associated Legendre functions. Quart. J. Mech. Appl. Math. 17:513-23, 1964

With V.C.A. Ferraro. The induction of electric currents in an anisotropic ionosphere with a belt of high conductivity running along the equator. J. Atmos. Terr. Phys. 26:509, 1964

Cylindrical current sheet. Proc. Math. Phys. Soc. Egypt 5(4):123-9, 1956

Electromagnetic induction in shells and disks having special distribution of conductivity. Proc. Math. Phys. Soc. Egypt 4(4):9-16, 1952

Certain expansions connected with integral equations. Proc. Math. Phys. Soc. Egypt 4(2):9-14, 1951

The induction of electric currents in an uniform circular disk. Quart. J. Mech. Appl. Math 3:119-28, 1950

With A.T. Price. The induction of electric currents in a non-uniform ionosphere. Proc. Roy. Soc. A 195:198-224, 1948

### OFFICES/HONOURS

President, International Union of Geodesy and Geophysics (1975-9)

President, International Centre of Pure and Applied Mathematics (1992-6)