The phrase "allowed formula" is correct and usable in written English.
It can be used in contexts where you are referring to a formula that is permitted or accepted within certain guidelines or rules.
Example: "In this experiment, we must adhere to the allowed formula for calculating the results to ensure accuracy."
Alternatives: "permitted formula" or "accepted formula".
We can write this in turn as: The number of elements in x and not in y is not 0 and is not 1; which is a boolean combination of allowed formulas.
In April, Public Citizen sent letters to 2,600 hospitals calling on them to stop allowing formula marketing in their facilities.
When a ray propagates inside the duct, it will reflect off the duct rim creating a Keller cone of singly diffracted rays, allowing formulae to be obtained for the singly diffracted field using Keller's GTD.
The systems C and QC are only weakly connexive, but this is not surprising because these logics are paraconsistent and allow formulas A and ~A to be simultaneously satisfiable in the sense that a state and all its possible expansions may support the truth of both A and ~A.
Although no real testing is allowed to Formula One teams until early February, the rules do allow for a team to run a two-year-old car.
Beginning with a logical system for mathematics, one presumed to be free of contradictions, he invented an ingenious scheme that allowed the formulas in it to engage in a sort of double speak.
Using modern notation, Frege allowed for formulae like '(Fa & Fb) → ∃X Xa & Xb)' and '∀x∀y[x = y ↔ ∀X(Xx ↔ Xy)]'.
Speaking to what allows his formula to remain effective, Wolf declared, "it takes concentration and a commitment to keeping a vision in tact going forward".
This combination allows the formula to be tolerant to small structural differences.
High-resolution mass spectrometry offers great potential for untargeted metabolomics, as high mass accuracy often (but not always) allows direct formula assignment for each detected mass (m/ z).
