We study critical and stationary, i.e., with respect to both inner outer variations, points of polyconvex functionals the form for . In particular, we show that a.e. have locally constant determinant except in a relatively closed set measure zero, stationary almost everywhere. This is deduced from more general result concerning solutions , linearized problem also present some generalization ori...

The risk of explosion can occur in all activities involving flammable substances which, when mixed with air, form an explosive atmosphere. Explosion protection is intended to prevent the ignition atmospheres. Pressurization, as a type protection, 'p' based on introduction protective gas (air or inert gas) enclosure formation atmosphere within by maintaining overpressure relative surrounding and...