The phrase "problem is closed" is correct and usable in written English.
It can be used when discussing the resolution or conclusion of a problem or issue. For example: "The company has finally reached a decision and the problem is closed." "After months of negotiation, the contract was signed and the problem is closed." "We were able to find a solution and now the problem is closed for good."
Moreover, our opportunity to remedy to this grave problem is "closing" -- we have but five years.
While I have no problem with the concept the real problem is closing the private marketplace before the Exchange has proven effective.
But the real problem are closed, custom APIs that lock customers into a proprietary platform.
Inspired by the idea of stochastic maximum principle in optimal control theory and Hamadène's transform (see [15]), both the LQ SOC problem and the LQ NZSSDG problem are closed linked to a kind of coupled FBSDEs involving Poisson jumps, which is out of scope of the existing results in the FBSDEs theory.
The length of the evacuation process varied between a few hours to two days, with the worst evacuation problems being closed or flooded roads.
Even as politicians heatedly debate opening new regions to drilling, corralling energy speculators, or starting an Apollo-like effort to find renewable energy supplies, analysts say the real source of the problem is closer to home.
She feels the real problem is closer to home.
This planar problem is close to real flight conditions of a launcher ascent phase.
In some sense, this kind of nonlocal problem is closer to the actual model than the local problem, such as the model of non-Newton flux through a porous medium, the model for compressible reactive gases, the model of population dynamics, and the model of biological species with human-controlled distribution (see [2, 11 14] and references therein).
The main contributions of our proposed restoration strategy can be summarized as follows: (1) it takes account of the constituting nodes of a segment, the shortest moving path, and the moving task balance of MDCs, as such the problem is closer to a real application environment.
