}^{0/0-x-y}F\downharpoonright_{G_{yzx}}\ dz &= 0\label{m0}\\ \int_{z=0}^{y}F\downharpoonright_{G_{yzx}} +\int_{z=y}^{0/0-x-y}F\downharpoonright_{G_{zyx}}\ dz &= 0\label{m0}\\ \int_{z=0}^{0+\varepsilon-x}F\downharpoonright_{U_{yzx}} + \int_{z=0+\varepsilon-x}^{y}F\downharpoonright_{G_{yzx}} +\int_{z=y}^{0/0-x-y}F\downharpoonright_{G_{zyx}}\ dz &= 0\label{m0}\\ \int_{z=0}^{0+\varepsilon-x}F\downharpoonright_{U_{yzx}} + \int_{z=0+\varepsilon-x}^{0/0-x-y}F\downharpoonright_{G_{yzx}}\ dz &= 0\label{m0}\\ \int_{z=0}^{