A mathematics expert with a PhD in Mathematics from Federal University of Ceará (Brazil), specializing in elliptic PDEs, harmonic analysis, and mathematical olympiad training. With over 13 years of teaching experience, he has served as Associate Professor at Kent State University and math teacher at multiple schools in Brazil and the USA. He has trained numerous national and international math olympiad medalists, authored a calculus textbook, and published research in SIAM Journal on Mathematical Analysis. Proficient in curriculum development and student mentoring, he holds multiple teaching awards for olympiad preparation. His teaching covers calculus, algebra, topology, and number theory, with a focus on problem-solving and critical thinking.