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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 867 | . 2 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵)) | |
| 2 | elsucg 6385 | . 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 847 = wceq 1541 ∈ wcel 2113 suc csuc 6317 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-tru 1544 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-v 3440 df-un 3904 df-sn 4579 df-suc 6321 |
| This theorem is referenced by: suctr 6403 pssnn 9091 ttrcltr 9623 ttrclss 9627 ttrclselem2 9633 pwsdompw 10111 fin1a2lem4 10311 grur1a 10728 bnj570 35010 fineqvnttrclselem3 35228 satom 35499 satfv0 35501 satfvsuc 35504 satf00 35517 satf0suc 35519 sat1el2xp 35522 fmla 35524 fmla0 35525 fmlasuc0 35527 satfdmfmla 35543 finxpsuclem 37541 |
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