"there has existed" is a correct and usable phrase in written English.
It is an appropriate phrase to use when discussing the past; particularly when discussing something that has existed over a long period of time. For example: "For centuries, there has existed great debate over the cause of climate change."
There is no doubt drugs are a problem in Indonesia, and that the 'war on drugs' there has existed for some time".
Since the beginning of what the Poles call the "renewal" of their country, there has existed a curious disparity between Polish and Western judgments about the direction in which events are moving there.
By Jonathan Schell The New Yorker, April 20 , 1981P. 27 Since the beginning of what the Poles call the "renewal" of their country, there has existed a curious disparity between Polish and Western judgments about the direction in which events are moving there.
However, Professor David Larcker, one of the conference organizers, reminded the panelists that since 1997, there has existed a body of academic literature showing opportunistic and thus potentially abusive pricing of options, Ciesielski says.
Dating back to pederasty in Ancient Greece, there has existed a sincere social bond between older gay men and male youth – perhaps in the form of today's "bears" and "twinks" – where intimacy was mingled with the dispensing of emotional intellect.
As long as there has been a New York City party scene worth talking about, there has existed a more relevant, less predictable nightlife that is perhaps even more scene-y than the scene itself.
Records documenting the presence of someone at Homan Square, especially while they are there, have existed largely outside Chicago police's electronic records system.
Though there have existed some methodologies for solving this problem, such as genetic algorithms, gradient descent algorithms and neural networks, it is hard to say which one is more appropriate and more feasible.
Berndt found evidence that the seeps there had existed for at least 3000 years and saw no evidence that the ocean sediments had been heating up—and releasing methane on the decadeslong timescales associated with climate change.
In essence, metaphorically there had existed a type of swiss cheese morality in the code applying to athletes' offenses.
At the time Robert Dudley entered his new Welsh possessions there had existed a tenurial chaos for more than half a century.
