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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 873 | . 2 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵)) | |
| 2 | elsucg 6380 | . 2 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ suc 𝐵 ↔ (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵))) | |
| 3 | 1, 2 | mpbird 258 | 1 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ suc 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ wo 853 = wceq 1547 ∈ wcel 2119 suc csuc 6312 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-tru 1550 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-v 3433 df-un 3888 df-sn 4556 df-suc 6316 |
| This theorem is referenced by: suctr 6398 pssnn 9093 ttrcltr 9628 ttrclss 9632 ttrclselem2 9638 pwsdompw 10116 fin1a2lem4 10316 grur1a 10733 bnj570 35087 fineqvnttrclselem3 35304 satom 35584 satfv0 35586 satfvsuc 35589 satf00 35602 satf0suc 35604 sat1el2xp 35607 fmla 35609 fmla0 35610 fmlasuc0 35612 satfdmfmla 35628 finxpsuclem 37759 |
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