Internet giant, Google has marked the 125th birth anniversary of Indian mathematician Srinivasa Ramanujan with a doodle on its home page.

The doodle shows an Indian child writing geometrical figures and linear equations with a stick on the ground. The numeric value of Pi to the 21st decimal point is given below the doodle. The company's logo is created out of geometric figures like triangles, circles, semi-circles and squares. The mathematician was born on December 22, 1887 in Erode, Madras Presidency, which is now the state of Tamil Nadu. The Indian government marks his birth anniversary as the National Mathematics Day in the country.

Ramanujan was introduced to formal education in Mathematics at the age of 10 and within two years he had finished books on advanced trigonometry and even discovered his own theorems. As a teenager, he conducted research on Bernoulli numbers and the Euler-Mascheroni constant. After not succeeding in ohtersubjects, he moved to independent mathematical research and sent samples of his work to University of Cambridge.

Ramanujan was then invited by GH Hardy to work alongside him at Cambridge. He then became a Fellow of the Royal Society and Fellow of Trinity College at Cambridge in the UK. He is also credited with coming up with approximately 3900 results in the mathematics. His works including Ramanujan Theta Function and Ramanujan Prime helped in further research in the area.

The Government of India announced that 2012 will be marked as National Mathematical Year.