In this paper we consider a quasilinear parabolic equation in a bounded domain under periodic Dirichlet boundary conditions. Our main goal is to prove the existence of extremal solutions among all solutions lying in a sector formed by appropriately defined upper and lower solutions. The main tools used in the proof of our result are recently obtained abstract results on nonlinear evol... https://www.kingarte.com/product-category/dough-equipmentcommercial-donut-machines-food-servicecommercial-kitchen-equipmentbaking/