Srinivasa Ramanujan`s cryptic formula finally proved
London : Researchers have finally solved the 100-year-old cryptic deathbed puzzle that Indian mathematician Srinivasa Ramanujan had claimed came to him in dreams.
While on his death-bed in 1920, Ramanujan wrote a letter to his mentor, English mathematician G. H. Hardy, outlining several new mathematical functions that had never been heard before, along with a hunch about how they worked.
The mathematician often managed to leap from insight to insight without formally proving the logical steps in between, the Daily Mail reported.
“His ideas as to what constituted a mathematical proof were of the most shadowy description,” G. H. Hardy, Ramanujan’s mentor and one of his few collaborators, had once said.
Ken Ono of Emory University in Atlanta, Georgia, who has previously unearthed hidden depths in Ramanujan’s work, was prompted by Ramanujan’s 125th birth anniversary, to look once more at his writings.
“I wanted to go back and prove something special,” Ono said.
Ono settled on a discussion in the last known letter that Ramanujan wrote to Hardy, concerning a type of function now called a modular form.
The functions looked unlike any other modular forms, but Ramanujan wrote that their outputs would be very similar to those of modular forms when computed for the roots of 1 like the square root -1.
It was only 10 years back that mathematicians formally defined this other set of functions, now known as mock modular forms.
But still no one could understand what he meant by saying that the two types of function produced similar outputs for roots of 1.
Now Ono and have colleagues have exactly calculated one of Ramanujan’s mock modular forms for values very close to -1, and said the difference in the value of the two functions, ignoring the functions signs, is tiny when computed for -1, just like Ramanujan said.
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