The shear dynamics in Bianchi I cosmological model on the brane with a perfect fluid (the equation of state is $p=(gamma-1) mu$) is studied. It is shown that for $1 < gamma < 2$ the shear parameter has maximum at some moment during a transition period from nonstandard to standard cosmology. An exact formula for the matter density $mu$ in the epoch of maximum shear parameter as a function of the equation of state is obtained.
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