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The phrase "a classical problem in" is correct and usable in written English.
It can be used when referring to a well-known or traditional issue within a specific field or discipline.
Example: "The traveling salesman problem is a classical problem in optimization and computer science."
Alternatives: "a traditional issue in" or "a well-known challenge in".
Exact(36)
Flow of a viscous fluid past a stretching sheet is a classical problem in fluid dynamics.
The rejection of perturbations is a classical problem in control theory.
The economic load dispatch problem (ELDP) is a classical problem in the power systems community.
Premature convergence is a classical problem in finding optimal solution in genetic algorithms.
The estimation of queues at signalized intersections is a classical problem in transportation engineering and operations research.
Providing both fish and plants with optimal environmental conditions is a classical problem in the field of aquaponics.
Similar(24)
Restoration of blurred and noisy images is a classical problem arising in many applications, including astronomy, biomedical imaging, and computerized tomography [1].
Sampling uniformly from a single simplex is a classical problem solved in O(d log d) time.
Based on the interval concept, we present here a methodology for data reconciliation and mass balance equilibration which is a very classical problem in mineral and chemical engineering.
The existence of homoclinic orbits for Hamiltonian systems is a classical problem and its importance in the study of the behavior of dynamical systems has been recognized by Poincaré [1].
It is well known that the existence of homoclinic orbits for Hamiltonian systems is a classical problem and its importance in the study of the behavior of dynamical systems has been firstly recognized by Poincaré [5].
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com