The phrase "a fundamental variable of" is correct and usable in written English.
It can be used in contexts where you are discussing a key factor or element that plays a crucial role in a particular system or situation.
Example: "In the study of economics, supply and demand are considered a fundamental variable of market behavior."
Alternatives: "a key factor in" or "an essential component of".
The significance of gender as a fundamental variable to be studied in the development and progression of disease has been a long standing topic of interest [ 1].
A fundamental variable to consider is the quality of the data that can be obtained from microarray expression profiling of complex, heterogeneous epithelial tumors.
An alternative formulation is proposed in which the bending deflection is regarded as a fundamental variable in place of the angle of rotation due to bending.
Why? "Sex 'really has to be considered as a fundamental variable' when designing experiments, says Janine Clayton, director of the Office of Research on Women's Health".
This unexpected temporal pattern, especially for high performing students prompted the researchers to take a step back and measure a fundamental variable and that was the total number of accesses in the entire cycle.
The concept of an acquisition window is also introduced as a fundamental variable in live network acquisition.
The fundamental variable of the model is the MOST transconductance to current drain ratio gm/ID.
The fundamental variable of this study was the level of children's exposure to floods, measured as whether the village was flooded (1) or not (0).
The fundamental variables of this formulation are the pressure difference, the difference in electrical potential between two reversible electrodes and the concentration dependent par of the chemical potential of the solutes.
The thermal conductivity of the soil is another fundamental variable in the design of a GSHP, and hence it is better to rely on site-specific data, rather than adopting values from the literature.
