Description: The section relation is a relation between morphisms from X to Y and morphisms from Y to X . (Contributed by Mario Carneiro, 2-Jan-2017)
Ref | Expression | ||
---|---|---|---|
Hypotheses | issect.b | |
|
issect.h | |
||
issect.o | |
||
issect.i | |
||
issect.s | |
||
issect.c | |
||
issect.x | |
||
issect.y | |
||
Assertion | sectss | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | issect.b | |
|
2 | issect.h | |
|
3 | issect.o | |
|
4 | issect.i | |
|
5 | issect.s | |
|
6 | issect.c | |
|
7 | issect.x | |
|
8 | issect.y | |
|
9 | 1 2 3 4 5 6 7 8 | sectfval | |
10 | opabssxp | |
|
11 | 9 10 | eqsstrdi | |