The phrase "a mathematical approximation of" is correct and usable in written English.
It can be used when discussing a method or model that estimates a value or function in mathematics or related fields.
Example: "The researchers developed a mathematical approximation of the complex equation to simplify their calculations."
Alternatives: "a numerical estimate of" or "a mathematical model of".
The LPC model is based on a mathematical approximation of the vocal tract.
In this work, Hirose considers empirical studies of biological snakes to derive a mathematical approximation of the most common gait pattern among biological snakes, known as lateral undulation.
Considering the aforementioned evidence, we constructed a mathematical approximation of the PSF of IR2 with the point-symmetric term and the axisymmetric terms (in the X- and Y-directions).
To assess the utility of a mathematical approximation of reality, it is essential to determine the consistency of the model's predictions with real-world benchmarks.
A mathematical approximation of a complex biophysical system must account for multiple sources of uncertainty, due to stochastic noise, experimental error, or other possible fluctuations induced by the interaction of the system with its surrounding.
The main assumptions for the mathematical approximation of the temperature disturbances due to drilling are: drilling is continuous and regular, there is no fluid loss, and thermal diffusivity equals that of the surrounding rocks.
b Mathematical approximation of the IR2 PSF as described in the text.
Metamodels are mathematical approximations of simulation models, and have been frequently used to reduce the computational burden associated with running such simulation models.
However, researchers often work with mathematical approximations of the contact networks to simplify analysis.
Four-tenths of a second seems to be a sound mathematical approximation.
The model is generated using a suitable mathematical approximation method, which relies on testing a relatively small subset of all possible signal combinations and is capable of predicting the response to the complete set of signal combinations.
