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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 6387 | . 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 6319 |
| 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 2708 |
| 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 2715 df-cleq 2728 df-clel 2811 df-v 3442 df-un 3906 df-sn 4581 df-suc 6323 |
| This theorem is referenced by: suctr 6405 pssnn 9093 ttrcltr 9625 ttrclss 9629 ttrclselem2 9635 pwsdompw 10113 fin1a2lem4 10313 grur1a 10730 bnj570 35061 fineqvnttrclselem3 35279 satom 35550 satfv0 35552 satfvsuc 35555 satf00 35568 satf0suc 35570 sat1el2xp 35573 fmla 35575 fmla0 35576 fmlasuc0 35578 satfdmfmla 35594 finxpsuclem 37602 |
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