Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_57c8600e4bc6abecef2ae17962906fa2de1fc16f5d46ed100ff99cd5b67f5b1b with
x1,
setsum x0 x1,
Inj1 leaving 2 subgoals.
The subproof is completed by applying unknownprop_509aadde20bd8e655e679e36fea278577d08a1dbe475eed73f3fccc8c2d65f15 with x0, x1.
Let x2 of type ι be given.
Let x3 of type ι be given.
The subproof is completed by applying unknownprop_da82029798a5f9bbb993db5eff220fcf8fcae5b2fe3af56ebe878a8d8aeef3c3 with x2, x3.