The phrase "although there exist many" is correct and usable in written English.
It can be used to introduce a contrast or exception in a statement, often followed by a specific example or situation.
Example: "Although there exist many challenges in the project, we are confident in our team's ability to overcome them."
Alternatives: "even though many exist" or "despite the existence of many".
Although there exist many surveys on the energy efficiency in big data but the existing research does not provide a thorough insight of energy efficiency in the context of big data and CASs.
Although there exist many approaches for single target based drug design and target inference, recent years have seen a paradigm shift to system-level pharmacological research.
Although there exist many experiences about using archetypes in the literature, a comprehensive and formal methodology for archetype modeling does not exist.
Although there exist many graphical programs to represent the shear stress (or slickenline) orientations on faults, programs to quantitatively calculate the orientation of fault slip based on a given stress field are scarce.
Although there exist many versions of precaution, the general gist is that, where there are threats to human health or environment, scientific uncertainty is not a reason for inaction.
Although there exist many methods and technologies for using pumped-storage or battery-storage to accommodate the wind power variability.
On the one hand, the constrained optimization equation of WCB is a nonconvex NP-hard problem; although there exists many methods [12, 19] to solve it, there is no closed-form solution until now.
In the literature there exist many examples of different distances.
This is probably oneof the Banach space constants which has been most widely studied, although withconsiderable confusion because there exist many equivalent definitions.
Although we assessed 75 genes/76 disorders, it is clear that there exist many others that could be assessed, in particular the so called hypomorphs.
Although we observe the effect due to tag-position, there exist many other factors which could affect gene expression level.
