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| Mirrors > Home > MPE Home > Th. List > elelsuc | Structured version Visualization version GIF version | ||
| Description: Membership in a successor. (Contributed by NM, 20-Jun-1998.) |
| Ref | Expression |
|---|---|
| elelsuc | ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ suc 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | orc 868 | . 2 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵)) | |
| 2 | elsucg 6395 | . 2 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ suc 𝐵 ↔ (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵))) | |
| 3 | 1, 2 | mpbird 257 | 1 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ suc 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ wo 848 = wceq 1542 ∈ wcel 2114 suc csuc 6327 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-v 3444 df-un 3908 df-sn 4583 df-suc 6331 |
| This theorem is referenced by: suctr 6413 pssnn 9105 ttrcltr 9637 ttrclss 9641 ttrclselem2 9647 pwsdompw 10125 fin1a2lem4 10325 grur1a 10742 bnj570 35081 fineqvnttrclselem3 35301 satom 35572 satfv0 35574 satfvsuc 35577 satf00 35590 satf0suc 35592 sat1el2xp 35595 fmla 35597 fmla0 35598 fmlasuc0 35600 satfdmfmla 35616 finxpsuclem 37652 |
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