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| Mirrors > Home > MPE Home > Th. List > sbceq1a | Structured version Visualization version GIF version | ||
| Description: Equality theorem for class substitution. Class version of sbequ12 2285. (Contributed by NM, 26-Sep-2003.) |
| Ref | Expression |
|---|---|
| sbceq1a | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ [𝐴 / 𝑥]𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sbid 2289 | . 2 ⊢ ([𝑥 / 𝑥]𝜑 ↔ 𝜑) | |
| 2 | dfsbcq2 3745 | . 2 ⊢ (𝑥 = 𝐴 → ([𝑥 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)) | |
| 3 | 1, 2 | bitr3id 287 | 1 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ [𝐴 / 𝑥]𝜑)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 = wceq 1559 [wsb 2089 [wsbc 3742 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-12 2211 ax-ext 2733 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-sbc 3743 |
| This theorem is referenced by: sbceq2a 3754 elrabsf 3787 cbvralcsf 3892 reusngf 4630 rexreusng 4635 reuprg0 4658 rmosn 4675 rabsnifsb 4678 euotd 5479 reuop 6275 frpoinsg 6325 elfvmptrab1w 6998 elfvmptrab1 6999 ralrnmpt 7072 riotass2 7378 riotass 7379 oprabv 7451 elovmporab 7637 elovmporab1w 7638 elovmporab1 7639 ovmpt3rabdm 7650 elovmpt3rab1 7651 tfisg 7829 tfindes 7838 sbcopeq1a 8025 sbcoteq1a 8027 mpoxopoveq 8193 findcard2 9127 ac6sfi 9222 indexfi 9297 setinds 9698 frinsg 9703 nn0ind-raph 12667 fzrevral 13611 wrdind 14729 wrd2ind 14730 prmind2 16710 elmptrab 23875 isfildlem 23905 2sqreulem4 27506 gropd 29189 grstructd 29190 rspc2daf 32624 opreu2reuALT 32635 ifeqeqx 32701 wrdt2ind 33092 bnj919 35024 bnj976 35034 bnj1468 35102 bnj110 35114 bnj150 35132 bnj151 35133 bnj607 35172 bnj873 35180 bnj849 35181 bnj1388 35289 dfon2lem1 36092 rdgssun 37833 indexdom 38194 sdclem2 38202 sdclem1 38203 fdc1 38206 riotasv2s 39543 elimhyps 39546 sbccomieg 43331 rexrabdioph 43332 rexfrabdioph 43333 aomclem6 43597 pm13.13a 44944 pm13.13b 44945 pm13.14 44946 tratrb 45073 uzwo4 45594 or2expropbilem2 47588 reuf1odnf 47662 ich2exprop 48038 ichnreuop 48039 ichreuopeq 48040 prproropreud 48076 reupr 48089 reuopreuprim 48093 |
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