= Gray stability theorem
{c}
{title2=$\rho_t^*\alpha_t=u_t\alpha_0,\quad u_t>0$}
= Gray's stability theorem
{c}
{synonym}
A smooth interval family of <contact forms> on a compact manifold without boundary is carried back to its initial <contact distribution> by a <smooth isotopy>. The pullback of each form is a positive smooth multiple of the initial form. Solve for the <horizontal generator of contact stability> and integrate the resulting scalar equation for the <contact conformal factor along an isotopy>.
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