Description: Alternate definition of the class of converse reflexive relations. (Contributed by Peter Mazsa, 22-Jul-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | dfcnvrefrels3 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-cnvrefrels | |
|
2 | df-cnvrefs | |
|
3 | 1 2 | abeqin | |
4 | dmexg | |
|
5 | 4 | elv | |
6 | rnexg | |
|
7 | 6 | elv | |
8 | 5 7 | xpex | |
9 | inex2g | |
|
10 | brcnvssr | |
|
11 | 8 9 10 | mp2b | |
12 | inxpssidinxp | |
|
13 | 11 12 | bitri | |
14 | 3 13 | rabbieq | |