"proved to exist" is a correct and usable phrase in written English.
You can use it when providing evidence for the existence or truth of something. For example, "My thesis was proved to exist by a wealth of scientific data."
If the Axiom of Infinity is reformulated to assert the existence of Vω , then the ranks proved to exist as sets by Zermelo set theory are exactly those which appear in the natural model Vω+ω of this theory.
The Inquiry found that no connection had been proved to exist between DS Davidson and Clifford Norris.
But both the transfer RNA's and the adaptor enzymes proved to exist, as Dr. Crick had predicted.
They fear that if this thing is proved to exist the public will spend half its annual income in a holiday shopping frenzy.
The cells have been proved to exist in primates, and scientists think they will be found in all mammals, including humans.
This week, the state media disputed a list of Tibetan victims released by the Tibetan government in exile, saying that many of the names could not be proved to exist.
Using Maxwell equation and boundary condition, GSP modes were proved to existed for both TE and TM polarization[12, 23 25].
"Not a single person, place or event unique to Joseph Smith's 'gold Bible' has ever been proven to exist".
Down the deepest mine in Europe, staff from the Institute of Underground Sciences keep watch for dark matter, that elusive substance proven to exist but never yet seen.
Mr. Kroenlein said the garage would be the best answer to the parking concerns that have been raised over the years, and proven to exist by studies.
It's fully understood, in the same way particle physics fell into place when the Higgs boson was proven to exist.
