Jackson studies supersonic airflow

Obi became a pioneering Nigerian mathematician known for research on nonlinear differential equations.

His work examined conditions under which nonlinear equations produce repeating behaviour and algebraic limit cycles.

Obi taught and supervised research as African universities expanded beyond colonial educational structures.

He also organized politically and argued about Nigeria's development, showing that mathematicians can participate directly in public struggles.

Jackson moved from the West Area Computing Unit into engineering and became NASA's first Black female engineer.

She needed special permission to attend classes held at an all-white school, exposing how law restricted scientific careers.

She left engineering management for equal-opportunity work aimed at improving hiring and promotion routes.

The Indian mental calculator became internationally famous for rapidly performing difficult arithmetic without electronic aids.

Her demonstrations made large-number operations visible and exciting to mass audiences across many countries.

She built authority outside a conventional academic research path, raising questions about mental skill, education and mathematical culture.