Tenenblat obtained her MSc (1969) at the Univ. of Michigan and PhD (1972) at the Instituto de Matemática Pura e Aplicada, Rio de Janeiro. She has served in various capacities at the Univ. de Brasilia, Brazilian Mathematical Society, Ministry of Education, Ministry of Science and Technology (Brazil) and other organizations and committees. She is professor emeritus of mathematics at the Univ. de Brasilia. An expert in differential geometry, she has advanced understanding of the interaction between differential geometry and partial differential equations. With S.S. Chern and other collaborators, she helped develop the classification of systems of differential equations that describe pseudo-spherical surfaces. Her membership includes: Brazilian Mathematical Society; American Mathematical Society; Brazilian Academy of Science; and Brazilian Society for the Advancement of Science. She received the Comendador de Ordem Nacional do Merito Cientifico from the President of Brazil in 1996.