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| Description: Substitution of equality into a subclass relationship. |
| Ref | Expression |
|---|---|
| sseqtr4.1 |
|
| sseqtr4.2 |
|
| Ref | Expression |
|---|---|
| sseqtr4 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sseqtr4.1 |
. 2
| |
| 2 | sseqtr4.2 |
. . 3
| |
| 3 | 2 | eqcomi 1479 |
. 2
|
| 4 | 1, 3 | sseqtr 2093 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eqimss2i 2112 iunxdif2 2598 intabs 2733 sssucid 3047 opabssxp 3234 relopab 3266 dmresi 3399 cnvimass 3423 ssrnres 3481 cnvcnv 3486 fvclss 3855 tfrlem11 3921 tz7.44-1 3928 tz7.44-2 3929 tz7.44-3 3930 oawordeulem 4188 mapex 4328 mapsspw 4341 trcl 4645 rankpw 4684 aceq3lem 4732 aceq3 4733 brdom7disj 4804 brdom6disj 4805 cfsuc 4915 cfom 4916 ressxr 5498 nnssnn0 6102 ser1f0 7170 opnfss 7858 cncfmet1 7906 remetba 7909 tgioolem 7914 tgioo 7915 ghsubgi 8138 nmcnc 8342 ipasslem8 8497 shsspwh 9118 hhssabl 9132 hhssnv 9134 hhshsslem1 9137 sshhococ 9469 pjoml6 9532 osumlem8 9585 osumcor 9587 mayete3 9673 pjclem1 10123 pjc 10128 mdcompl 10356 dmdcompl 10357 efilcp 10572 efilcpOLD 10573 stoi 10639 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-in 2051 df-ss 2053 |