"rigid assumptions" is a correct and usable phrase in written English.
It can be used to describe beliefs or ideas that are inflexible or unyielding. Example: The scientist's research was hindered by his rigid assumptions about the way the natural world worked.
Most difficulties in water negotiations are due to rigid assumptions about how water must be allocated.
Never mind that DeMott's notion of women-becoming-men depends, despite his protestations to the contrary, on rather rigid assumptions about masculine and feminine behavior in the first place.
Therefore, an alternative test such as nonparametric method for which validity does not depend on rigid assumptions can be considered [6, 22].
We foresee that our approach may provide a natural and powerful method by which one can express more complex structural correlations such as those present in frustrated and disordered systems, correlations that may lie obscured by the rigid assumptions of classical crystallography in two dimensions.
Under this background, the traditional theory of net present value cannot provide sufficient reliable reference for the decision making of deepwater oil and gas investment, because the value of flexibility from the uncertainties in oil price, engineering, and technology cannot be measured under the rigid assumptions.
He didn't make rigid assumptions". Ultimately "Genius" isn't about convoluted scientific theories.
Behavioral economics had finally arrived: a discipline that for a half-century had built its theories on the rigid assumption that people acted with rational, unemotional self-interest had formally recognized that human beings had another, feisty, side to them.
The daughter's version squares with the Giuliani administration's rigid assumption that anyone shackled to the dole for more than a few months would inevitably sink into indolence.
We bootstrap estimated individual causal effects (EICE) over circular block-differences (under the less rigid assumption of heterogeneous causal effects) (see de Luna et al. [2010]).
The IIA property of MNL model stems from the rigid assumption that the utility random terms of alternatives parts have totally independent structures.
The rigid assumption that the utility random terms of alternative parts satisfy independent identical distribution (IID) conditions makes MNL simple in calculation as well as provides MNL with independence of irrelevant alternatives (IIA) property, which weakens its ability of recurring the actual choice behaviours [1].
