In order to overcome the force of the 6 strings that anchor a VG in the BF, according to [1], it is necessary to apply a minimal force. This force corresponds to the inertia of a punctual particle since it represents the smallest possible resistance of the space:

[3]        F_i = 6 E(S)/l = E_kmin/l

            Where:            F_i :       Inertia of a punctual fermion

l :         Minimal length, a minimum force must be applied, in order to loosen the 6   strings of a VG

The minimal length „l“ corresponds probably to a value close to Planck’s Elementary Length, since the length of a string is probably the smallest length that can exist at all.

The constant interactions with VGs withdraw kinetic energy from a moving punctual fermion, so that its kinetic energy becomes always less. With each interaction, according to [2], a particle looses the potential energy of 6 strings:

[4]        E‘_k = E_k - 6 E(S) = E_k - E_kmin

Where:            E‘_k :                 Kinetic energy of a punctual fermion after a neutral interaction.

            E_k :                Kinetic energy of a punctual fermion before a neutral interaction.

A neutral fermion is therefore constantly decelerated by the inherent resistance of the BF. Furthermore, there is a minimum velocity at which a neutral fermion can move through the BF. To achieve this minimum velocity from the “absolute rest“, it is necessary to apply a minimum force in order to overcome the resistance of the BF. This force is again the inertial force. A particle can move through the space, only if it is accelerated to the above mentioned minimum velocity.

Supposing a punctual fermion is in a certain instant overcoming inertia from the absolute rest, it will achieve a minimum velocity, interacting each time, in a minimum time, with 1 VG, at a length, approx. equal to Planck's Elementary Length:

[5]        F_i = m v_min/t_min = 6 E(S)/l

Where:            F_i :       Inertia of a fermion.

                                   m :       Mass of a fermion.

v_min :    Absolute minimum velocity that a fermion can reach in the BF.

t_min :    Minimum time, necessary to loosen the 6 strings of one VG in the BF.

l :        ~ Planck's Elementary Length.

Each time a VG from the BF interacts and produces a RG, the BF changes (it contracts due to the expulsion of 1 RG out of the 3-D matrix). When a fermion crosses the space, the global contraction of the BF is proportional to the total amount of interactions with VGs of the BF. As a result, in our universe, the BF is constantly contracting and a constant momentary reduction of the BF takes place. Since in the space, there is an almost unlimited number of VGs, the BF is reorganized constantly by the surrounding VGs. To do this, the free ends of the strings of those VGs, adjacent to the VGs that were converted into RGs and left the BF, do connect each other, thus producing again an intact, although contracted, BF.