The phrase 'stable direction' is correct and usable in written English
You can use it to refer to a feeling of direction and security in a situation, especially when referring to goals, plans, or decisions. For example: "Having a good plan and a stable direction have helped me stay focused on my goals."
"If the breeze stabilizes like it did today, where we had a quite stable direction for an hour before the race was canceled, we'll have to live with that.
The moment will act in the stable direction only as long as the point M (the "metacentre," the point where the buoyant force intersects the midplane) is above G (the centre of gravity of the ship and its contents).
The focus fixed point in Fig. 3(b) now has one stable direction and two unstable ones.
However, a stable direction of the azimuthal vector of Poynting flux for all of selected events could not be determined.
The impact of the redundant stable direction of the ME-Halo orbit is analyzed through a survey of apogee transfers using both of its two stable directions.
Its special properties, including a long period and a redundant stable direction, make it a promising nominal orbit in space mission design.
The focus fixed point shown in Fig. 1(b) becomes stable, while the saddle fixed point in that figure remains a saddle, but with two stable directions.
As a result, stable directions of the Poynting vector in the plane perpendicular to the magnetic field were determined for about a half of the selected events.
We remark that the dynamics for τ slightly larger than (tau_{HC}) is difficult to analyze; while the origin is unstable, it has stable directions and it appears that all initial data eventually converge to it.
Hence, we get in many reasonable first-exit problems for the Amari model with trace-class noise that there is a finite set for n ≤ N of "slow" or "center-like" directions and an infinite set of "fast" or "stable" directions for n > N.
If the potential has precisely two local minima u ± ∗ and a saddle point u s ∗ with N − 1 stable directions so that the Hessian ∇ 2 V ( u s ∗ ) has eigenvalues ρ 1 ( u s ∗ ) < 0 < ρ 2 ( u s ∗ ) < ⋯ < ρ N ( u s ∗ ).
