"the question of existence" is a correct and usable phrase in written English.
It refers to the concept or notion of whether something or someone exists. Example: The question of existence has been a topic of philosophical debates for centuries.
The question of existence consumed me".
We address the question of existence and stability of periodic solutions in gene regulatory networks.
In his later years, he turned to examine the foundation of quantum mechanics and the question of existence, which also had a significant impact.
Magazines are pushing "postmodern preppy" and "country club chic" looks as if they were the answer to the question of existence.
We investigate the question of existence of a solution to the system and we design a numerical scheme for its approximation.
The question of existence of a minimum is relevant to all slope stability formulations which satisfy equilibrium conditions without a priori assumptions with respect to the shape of potential slip surfaces.
For this system of equations the questions of existence, regularity and the stability of solution are analysed.
In a complete solution of inverse problems, the questions of existence, uniqueness, stability and construction are to be considered.
The authors studied in depth the questions of existence and uniqueness, they also gave a useful comparison theorem.
We investigate the questions of existence of positive solution for the nonlocal problem and on, where is a bounded smooth domain of, and and are continuous functions.
In recent years, there has been a great deal of research on the questions of existence and uniqueness of solutions to boundary value problems for differential equations of fractional order.
