Depending on the way we use them, pitchforks can be streamlike or anti-streamlike.
Moreover, it does not fall into any pitchfork class known.
This is the so-called pitchfork bifurcation which determines the incidence of three-dimensional wave motions.
On the other hand, the amplitude equation (2.31) directly expresses the pitchfork bifurcation at the critical state.
This stability is finally transferred to spatially modulated two-dimensional rolls in another pitchfork bifurcation.
The case 0 (1) > 0 is usually referred to as a subcritical pitchfork bifurcation, and the case 0 (1) < 0 as a supercritical pitchfork bifurcation.
Each pitchfork occurring in the design is the conclusion of a unique rule among those given below.
The initial bifurcation (a pitchfork) gives rise to supercritical branches of diagonal rolls and small squares, of which only the latter are stable.
