"a definite problem" is a correct and usable phrase in written English.
You can use it to indicate that a certain issue is known and easy to pinpoint. Example: "There is a definite problem with the engine; it just won't start."
"I have a definite problem with Tarantino's excessive use of the n-word," he said.
"But the snake in a bow tie was a definite problem".
"There is a definite problem around young men not feeling like they can talk about their issues, which can make self-harm quite a common issue among them".
Self-indulgence of a rather livelier, albeit self-destructive kind was a definite problem for the characters in "27," from the Philadelphia company New Paradise Laboratories.
Ratnavel says: "Cot capacity is a definite problem and it can be hard sometimes to accommodate a newborn baby needing intensive care in a hospital near its home, which means that we need to send some babies further afield because there's no cot available in London".
It wasn't all plain sailing; Alison phoned me at one point to ask: "Do you envisage these animals wearing clothes?" Axel's first sketches had the mouse in a checked shirt and the fox in a frock coat, which was almost OK – but the snake in a bow tie was a definite problem.
Even though science is constantly revising itself, constantly adapting to new information and ideas, at any moment a scientist is studying a more or less definite problem, formulated to lead to a definite answer.
By using the LS-SEM, a symmetric positive definite problem is always obtained, making it possible to use highly efficient solvers for this kind of problems.
Considering that a vehicle traveling at a speed of 30 miles per hour has a 45percentt kill rate when striking a pedestrian, it's a startling figure — and definite problem area that requires immediate attention.
The uniqueness of the solution for the definite problem of a parabolic variational inequality is proved.
The calculation problem of sound radiation can usually be described as a definite solution problem of wave equations under certain boundary conditions [29].
