Ethel Lilian (1864–1960), who married the Polish scientist and revolutionary Wilfrid Michael Voynich and was the author of the novel The Gadfly.
In particular, his Differential Equations and the Calculus of Finite Differences (1839) incorporated the new solution of the Laplacian equation for the figure of the earth as given by Thomas Gaskin in symbolic form; it was the elaboration of this original solution by Robert Leslie Ellis in 1841 which led largely to George Boole's masterpiece On a general method in analysis in 1844 (PRS, 5, 1843–50).
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Thus, he extended and augmented the works of logicians and mathematicians George Boole, William Stanley Jevons and Ernst Schröder.
His main publications include two books on George Boole, a book on the Indian poet-philosopher Muhammad Iqbal, Islam et société ouverte. La fidélité et le mouvement dans la pensée de Muhammad Iqbal (2001) and an examination of Senghor’s philosophy, Léopold Sédar Senghor. L’Art africain comme philosophie (2007).