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| Description: Deduction rule based on subclass definition. |
| Ref | Expression |
|---|---|
| ssrdv.1 |
|
| Ref | Expression |
|---|---|
| ssrdv |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssrdv.1 |
. . 3
| |
| 2 | 1 | 19.21aiv 943 |
. 2
|
| 3 | dfss2 1497 |
. 2
| |
| 4 | 2, 3 | sylibr 175 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: sscon 1599 ssdif 1600 prss 1854 tpss 1855 sspwb 1863 pwssun 1917 intss1 1979 intmin 1982 ss2iun 2005 ssiun2 2019 tz7.7 2224 ordon 2238 ssorduni 2249 onint 2261 limsssuc 2362 limomss 2378 dmss 2530 chfnrn 2885 tz7.48-1 2994 tz7.49 2997 oaass 3163 mapenlem2 3385 pssnn 3428 inf3lemd 3463 inf3lem1 3464 inf3lem6 3469 r1tr 3498 zornlem4 3606 zornlem5 3607 unxpdomlem 3649 carduni 3664 genpss 3901 distrlem1pr 3921 distrlem5pr 3925 ltexprlem2 3937 ltexprlem6 3941 ltexprlem7 3942 reclem3pr 3952 reclem4pr 3953 suppsrlem 4015 suprelem 4053 infxpidmlem7 4939 infxpidmlem8 4940 ococss 5174 pjoml 5271 shsub1t 5289 shless 5348 shmods 5363 spansnsst 5476 pjjs 5585 sumdmdi 5785 sumdmdlem 5786 sumdmd 5787 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-16 922 ax-17 925 ax-ext 1074 |
| This theorem depends on definitions: df-bi 128 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-in 1491 df-ss 1492 |