The phrase "a multitude of existing" is correct and usable in written English.
It can be used when referring to a large number of things that are already present or available.
Example: "In our research, we found a multitude of existing studies that support our hypothesis."
Alternatives: "a large number of existing" or "many existing".
In order to fully maximize the potential of zebrafish in cancer research, strategic areas, such as systematic and scalable methods of functional gene interrogation, using the multitude of existing models, should become a priority.
The detection and localization of transient signals is nowadays a typical point of interest when we consider the multitude of existing transient sources, such as electrical and mechanical systems, underwater environments, audio domain, seismic data, and so forth.
Finding new signals in this virgin territory will be easy, but figuring out what those signals are, and how they might relate to the multitude of existing theories, will not.
Despite the long history of classical planning, there has been very little comparative analysis of the performance tradeoffs offered by the multitude of existing planning algorithms.
Because decay heat measurements can be expensive or impractical for covering the multitude of existing fuel designs, operating conditions, and specific application purposes, decay heat estimation relies heavily on computer code prediction.
One major obstacle is that the multitude of existing measures makes it difficult to decide which measures may be appropriate for a specific application.
Two possible approaches have been suggested to addressing the difficulties raised by the multitude of existing theories on health behaviour change.
However, debate has recently arisen in several scientific forums over whether these regulations adequately protect human and environmental health from the new pharmaceutical drugs introduced each year into the marketplace and the multitude of existing products, each with many distinct biochemical modes of actions.
Our results are improved versions of a multitude of relevant fixed point theorems of the existing literature.
