Beijing, June 4 (Xinhua) Leading Chinese mathematician Yang Le Sunday said the successful unravelling of one of the world's toughest puzzles was an outstanding job.

Two Chinese mathematicians Zhu Xiping and Cao Huaidong have put the final pieces together in the solution to the puzzle that has perplexed scientists around the globe for more than a century.

The duo published a paper in the latest US-based Asian Journal of Mathematics, providing complete proof of the Poincare Conjecture promulgated by French mathematician Henri Poincare in 1904.

Columbian professor Richard Hamilton and Russian mathematician Grigori Perelman have laid foundation on the latest endeavours made by the two Chinese.

Hamilton completed the majority of the program and the geometrisation conjecture.

"All the American, Russian and Chinese mathematicians have made indispensable contribution to the complete proof," Yang, member of the Chinese Academy of Sciences, said.

--Xinhua