![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > ordsson | Structured version Visualization version GIF version |
Description: Any ordinal class is a subclass of the class of ordinal numbers. Corollary 7.15 of [TakeutiZaring] p. 38. (Contributed by NM, 18-May-1994.) (Proof shortened by Andrew Salmon, 12-Aug-2011.) |
Ref | Expression |
---|---|
ordsson | ⊢ (Ord 𝐴 → 𝐴 ⊆ On) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ordon 7764 | . 2 ⊢ Ord On | |
2 | ordeleqon 7769 | . . . . 5 ⊢ (Ord 𝐴 ↔ (𝐴 ∈ On ∨ 𝐴 = On)) | |
3 | 2 | biimpi 215 | . . . 4 ⊢ (Ord 𝐴 → (𝐴 ∈ On ∨ 𝐴 = On)) |
4 | 3 | adantr 482 | . . 3 ⊢ ((Ord 𝐴 ∧ Ord On) → (𝐴 ∈ On ∨ 𝐴 = On)) |
5 | ordsseleq 6394 | . . 3 ⊢ ((Ord 𝐴 ∧ Ord On) → (𝐴 ⊆ On ↔ (𝐴 ∈ On ∨ 𝐴 = On))) | |
6 | 4, 5 | mpbird 257 | . 2 ⊢ ((Ord 𝐴 ∧ Ord On) → 𝐴 ⊆ On) |
7 | 1, 6 | mpan2 690 | 1 ⊢ (Ord 𝐴 → 𝐴 ⊆ On) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 ∨ wo 846 = wceq 1542 ∈ wcel 2107 ⊆ wss 3949 Ord word 6364 Oncon0 6365 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-ext 2704 ax-sep 5300 ax-nul 5307 ax-pr 5428 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-sb 2069 df-clab 2711 df-cleq 2725 df-clel 2811 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3434 df-v 3477 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-br 5150 df-opab 5212 df-tr 5267 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-ord 6368 df-on 6369 |
This theorem is referenced by: dford5 7771 onss 7772 orduni 7777 ordsuci 7796 ordsucuniel 7812 ordsucuni 7817 iordsmo 8357 dfrecs3 8372 dfrecs3OLD 8373 tfr2b 8396 tz7.44-2 8407 ordiso2 9510 ordtypelem7 9519 ordtypelem8 9520 oiid 9536 r1tr 9771 r1ordg 9773 r1ord3g 9774 r1pwss 9779 r1val1 9781 rankwflemb 9788 r1elwf 9791 rankr1ai 9793 cflim2 10258 cfss 10260 cfslb 10261 cfslbn 10262 cfslb2n 10263 cofsmo 10264 coftr 10268 inaprc 10831 nosepon 27168 satfn 34346 rdgprc 34766 limsucncmpi 35330 limexissup 42031 limexissupab 42033 nadd2rabord 42135 nadd1rabord 42139 |
Copyright terms: Public domain | W3C validator |