The phrase "a strict proof" is correct and usable in written English.
It can be used in contexts where you are discussing a type of proof that is rigorous and adheres to strict standards, often in mathematics or logic.
Example: "The theorem was established through a strict proof that left no room for ambiguity."
Alternatives: "a rigorous proof" or "a formal proof".
Then, a strict proof is presented for a necessary and sufficient condition on the existence of a unique optimal positive definite solution to this equation.
We will give a strict proof of Theorem 1.1 in this section.
We give a strict proof of the local stability in this section.
In this paper, corresponding to a May cooperative system, we give a strict proof of an affirmative answer which is without any conditions.
However, it seems difficult to give a strict proof for the above equivalent relation (1.6) and its related counterpart due to the lack of a uniform change of the coordinates independent of j.
Although references [27, 28] proposed a SEIR model with hesitating mechanism, neither could serve as a strict proof of globally asymptotically stability of rumor-free equilibrium and the permanence of the rumor.
On one hand, already in the Betrachtungen Bolzano pointed out that he "could never be satisfied with a completely strict proof if it were not derived from the same concepts which the thesis to be proved contained" (Russ 2004, 32).
In this paper, we will get the strict proof of analysis of a kind of extension of Young inequality with the approximation method.
Then, a general method with a strict mathematical proof is proposed to calculate maximum axis radii of the unbalance response orbit for a geared rotor system.
In this paper, we propound an analogous symmetric theorem of workspace for spatial parallel manipulators with identical kinematic chains, and then present a strict mathematic proof by splitting the problem into planar symmetry, rotational axis symmetry and point symmetry (centrosymmetry).
The second one is a strict probabilistic proof.
