The phrase "a complex problem for" is correct and usable in written English.
It can be used when discussing a challenging issue that affects a particular person, group, or situation.
Example: "Climate change presents a complex problem for policymakers who must balance economic growth with environmental sustainability."
Alternatives: "a challenging issue for" or "a difficult situation for".
Hybridization poses a complex problem for biodiversity conservation but there has been little discussion of strategies and guidelines designed to address it from a management perspective.
The ability to reliably recognise three dimensional objects is a complex problem for both biological and artificial vision systems since the viewpoint from which the object is seen may dramatically affect the spatial relationships between visible local features of the object [1] [4].
Frailty poses a complex problem for primary care.
Chronic fatigue syndrome (CFS) comprises a complex problem for health care providers and patients.
Dealing with multi-morbidity is a complex problem for health systems: for those designing and implementing healthcare as well as for those providing the evidence informing practice.
For a complex problem of human body tracking, we have successfully employed constraints derived from joint angles and walking motion.
The strategy formulation is a complex problem, even for companies that are qualified for this task.
The next time you're making small talk about current events and you find yourself ready to argue for an oversimplified, blanket solution to a complex problem, pause for a moment.
The task of selecting an optimal collection route is a complex problem, especially for large and densely populated cities.
A rigorous treatment of such a complex problem calls for the use of non-smooth analysis tools to handle the impulsive nature of the impact force, the unilateral constraint, the impenetrability condition and the discontinuity of the velocity in a rigorous manner.
This is a very complex problem for a computer and needs a huge amount of computing power.
