Tuesday, November 20, 2012

Hardy- Ramanujan number

                                         Hardy- Ramanujan number

Hardy and Ramanujan were the famous mathematicians.  Ramanujan is Indian and since childhood, he had affection for mathematics.
The number is 1729. It is famous because,
1729 = 1^3  +  12 ^3  =  9 ^3 + 10 ^3
The importance of this number first came through the conversation of these two mathematicians. When Hardy had come to visit Ramanujan , he travelled by the taxi numbered 1729. When he had mentioned about this near Ramanujan, he said it is an interesting number.
It is very interesting because it is the smallest number expressible as the sum of two cubes in two different ways as shown above.

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