first proof in a sentence

Examples

1. The 1954 paper provided the first proof of the existence of a general equilibrium, using Kakutani's fixed point theorem.
2. For example, in 1955, he gave the world's first proof of the  theorem would not deny it.
3. The first proof appeared in a 1987 book by Jonathan and Peter Borwein, where they reconstructed Ramanujan work on the subject.
4. The Mint pressed two first proof samples on, when the Romanovs had already resolved the succession crisis in favor of Nicholas.
5. For 10 years the experts have suspected that a gene was a factor in bed-wetting but this is the first proof.
6. The paper " provides the first proof that reprogrammed human cells can supply tissue for transplantation, " the company said.
7. "This is the first proof that the Hasmoneans lived and were buried at this site, " said Efrat Orbach.
8. It is the first proof that the hostages, kidnapped by the Revolutionary Armed Forces of Colombia, or FARC, are alive.
9. The voice recording would be the first proof that al-Zawahri survived U . S . bombing in Afghanistan launched a year ago.
10. The video, aired on RCN and Caracol TV, was the first proof that the four Israeli and three European hostages were alive.