Lélio Itapuambyra Gama, Brazilian mathematician, astronomer and geophysicist (Rio de Janeiro 29 August 1892 – Rio de Janeiro 21 July 1981) 

Introduced notion of spheroidal structure spaces. It is the same as uniform structure enunciated by Weil in 1937   

Notion de proximité et espaces à structure sphéroidale. American Journal of Mathematics 67(1):42-58, 1945.

Another important work 

Limits d’ensemble dans les espaces abstraits. Summa Brasiliensis Mathematicae 1:1945-6

Proposed a fundamental theorem

Sur les fonctions d’intervalle. Anais Acad. Bras. Sciencias (1939)

Simplified the classical methods of reduction per day

Sobre o cálculo dos fatores de Kimura para a reducção ao dia (1925)

Improved the control of instrumental deviation in the observation of latitude variations

Estudo da precisão do método de Talcott (1929)

Proposed that curvature correction may be formulated as a function of median zenital distance by observed star pairs

On the computation of the reduction to the meridian in latitude observators. Astron. Nachrichten 5361:163-4, 1925

Developed a Talcott method for computing mean declination of a pair of stars using differential corrections of Kimura factors

Member, Astronomical Time and Earth Rotation Committee, International Astronomical Union (1956-64)   

SOME BIBLIOGRAPHY

Valores da gravidade nas regiões centro e sul do Brasil (1972)

Sobre a variação diurna do campo magnético no Brasil (1972)

Constante do micrômetro da luneta zenital de Heyde (1969)

Campo magnético normal e sua variação secular em 545 pontos geográficos do Brasil, 1880-1960 (1966)

Cyclic fluctuations in geomagnetic secular change (1915-1959) 1960

Précis de theorie du magnetometer (1957)

With C.A. Barros. Comparison of the Rude Skov and Vassouras magnetic standards by means of quartz horizontal-force magnetometers (1953)  

Recherches théoriques et pratiques sur les variometres unifilaires (1951)

Series numéricas (1947)

Sobre a integral imprópria (1941)

Sur l’additivité du contigent. Comptes Rendus Acad. Sci. Paris 207:29-31, 1938

Sur l’additivité de l’accumulatif. Comptes Rendus Acad. Sci. Paris 207:447-8, 1938

Contribuição a teoria dos limites. Anais Acad. Bras. Ciências (1937)

Sobre as equações diferenciais do movimento dos asteróides (1934)

On the computation of mean star factors for the deduction of latitude observations by Horrebow-Talcott method Astron. Nachrichten 5691:45-6, 1930

Estudo sobre as linhas geodésicas. Thesis (1929)

Contribuições para o estudo da variação das latitudes (1929)

Determinação da latitude (1929)

Cálculo do nascer e do occaso da Lua no Rio de Janeiro (1928)

Nota sobre a theoria do movimento diurno (1924)