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Mirrors > Home > MPE Home > Th. List > Mathboxes > wsuceq1 | Structured version Visualization version GIF version |
Description: Equality theorem for well-founded successor. (Contributed by Scott Fenton, 13-Jun-2018.) |
Ref | Expression |
---|---|
wsuceq1 | ⊢ (𝑅 = 𝑆 → wsuc(𝑅, 𝐴, 𝑋) = wsuc(𝑆, 𝐴, 𝑋)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2823 | . 2 ⊢ 𝐴 = 𝐴 | |
2 | eqid 2823 | . 2 ⊢ 𝑋 = 𝑋 | |
3 | wsuceq123 33103 | . 2 ⊢ ((𝑅 = 𝑆 ∧ 𝐴 = 𝐴 ∧ 𝑋 = 𝑋) → wsuc(𝑅, 𝐴, 𝑋) = wsuc(𝑆, 𝐴, 𝑋)) | |
4 | 1, 2, 3 | mp3an23 1449 | 1 ⊢ (𝑅 = 𝑆 → wsuc(𝑅, 𝐴, 𝑋) = wsuc(𝑆, 𝐴, 𝑋)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 wsuccwsuc 33099 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-xp 5563 df-cnv 5565 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-sup 8908 df-inf 8909 df-wsuc 33101 |
This theorem is referenced by: (None) |
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