"exists a cause" is a grammatically correct phrase that can be used in written English.
It is typically used when discussing the existence of a specific cause or reason for something. For example: - There exists a cause for your frequent headaches, and we need to investigate further to determine what it may be. - In this equation, exists a cause for concern as it may not accurately reflect the data. - I believe there exists a cause behind her sudden change in behavior, and I plan to talk to her to figure it out. In each of these examples, "exists a cause" is used to refer to a specific reason or explanation for something. It can also be used in other contexts, such as philosophical or scientific discussions, but it is not commonly used in everyday speech.
Conversely, everything that does not exist necessarily and therefore has a possible relation to existence is something that is possible, so that in order to exist it always and necessarily refers to a cause that makes it exist: a cause that justifies the fact that instead of being possible (mumkin) and therefore not already assigned to existence, the thing is qualified as existent.
Since The Charter of Workers Rights (Law 300/1970), individual dismissals are allowed in large firms only if there exists a "just cause" (for productive reasons or for severe misconduct of the employee).
Interestingly, calcium is a signaling molecule that is well known to play an important role in muscle contraction, and there exists a direct cause-and-effect relationship between MAP kinase activation and smooth muscle contraction (Dessy et al., 1998).
The sensitivity analysis results regarding the effects of various inputs on the chart parameters provide useful guidelines for designing an EWMA-based process control scheme when there exists an assignable cause generating concurrent changes in process mean and variance.
According to Chrysippus, every proposition is either true or false, and this must apply to future events as well: If any motion exists without a cause, then not every proposition will be either true or false.
In The Direction of Time Reichenbach acknowledges that the 1925 claims were incorrect and formulates a new "Principle of the Common Cause" this way: "If an improbable coincidence has occurred, there must exist a common cause" (p. 157).
If an adverse event such as hypotension or bronchospasm occurs during anaesthesia it is appropriate to suspect anaphylaxis unless there exists a significantly more likely cause.
Valve contained pipelines have witnessed a great growth and there exists a lot of noise caused by valves.
No perfect routing protocol exists, a limitation that is caused by their inability to adapt their behavior to the context of the network, which both varies in time and place.
However, for typical InGaN-based devices which are grown on c-plane, it is well known that there exists a large electric field caused by spontaneous and piezoelectric polarization effect, which affects the electrical and optical properties of the devices significantly [1, 2].
