Description: The group operation (which isn't much more than a magma) of the loop space. (Contributed by Mario Carneiro, 11-Feb-2015)
Ref | Expression | ||
---|---|---|---|
Hypotheses | om1bas.o | |
|
om1bas.j | |
||
om1bas.y | |
||
Assertion | om1plusg | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | om1bas.o | |
|
2 | om1bas.j | |
|
3 | om1bas.y | |
|
4 | fvex | |
|
5 | eqid | |
|
6 | 5 | topgrpplusg | |
7 | 4 6 | ax-mp | |
8 | eqidd | |
|
9 | 1 2 3 8 | om1bas | |
10 | eqidd | |
|
11 | eqidd | |
|
12 | 1 9 10 11 2 3 | om1val | |
13 | 12 | fveq2d | |
14 | 7 13 | eqtr4id | |