In addition to the Nobel, Nash received the John von Neumann Theory Prize in 1978 and the American Mathematical Society's Steele Prize for a Seminal Contribution to Research (1999). Just last week, he was in Norway to accept the 2015 Abel Prize for mathematical contributions with longtime colleague Louis Nirenberg.

Nirenberg called Nash's death a "horrible loss" especially considering "the wonderful week" they had just shared.

"He was truly a great mathematician, a most remarkable mathematician," Nirenberg said. "He made deep contributions with every paper he wrote."

"His wife was also a wonderful person. She looked after him after all these years. She was very special."

The couple stayed together through it all, marrying for a second time in 2001.

"We thought it would be a good idea," Alicia Nash said in a PBS documentary. "After all, we've been together most of our lives."

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