Maryam Mirzakhani, first woman to win Fields Medal in maths, dies at 40

Maryam Mirzakhani, an Iranian-born mathematician who was the first woman to win the coveted Fields Medal, has died in a US hospital after a battle with cancer. She was 40.

Mirzakhani' friend Firouz Naderi announced her death today on Instagram, and her relatives confirmed the death to the Mehr agency in Iran.

"A light was turned off today. It breaks my heart ..... gone far too soon," wrote Naderi, a former director of Solar Systems Exploration at NASA.

"A genius? Yes. But also a daughter, a mother and a wife," he added in a subsequent post.

Mirzakhani, a professor at Stanford University in California, died after cancer she had been battling for four years spread to her bone marrow, Iranian media said.

In 2014 Mirzakhani won the Fields Medal, the equivalent of the Nobel Prize for Mathematics, which is awarded by the International Congress of Mathematicians.

The award recognized her sophisticated and highly original contributions to the fields of geometry and dynamical systems, particularly in understanding the symmetry of curved surfaces such as spheres.

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