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| Mirrors > Home > MPE Home > Th. List > onss | Structured version Visualization version GIF version | ||
| Description: An ordinal number is a subset of the class of ordinal numbers. (Contributed by NM, 5-Jun-1994.) |
| Ref | Expression |
|---|---|
| onss | ⊢ (𝐴 ∈ On → 𝐴 ⊆ On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eloni 6374 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7799 | . 2 ⊢ (Ord 𝐴 → 𝐴 ⊆ On) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐴 ∈ On → 𝐴 ⊆ On) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 ⊆ wss 3896 Ord word 6363 Oncon0 6364 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-tr 5212 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-ord 6367 df-on 6368 |
| This theorem is used by: onuni 7804 onminex 7818 onssi 7851 tfi 7866 soseq 8180 tfr3 8412 tz7.49 8460 tz7.49c 8461 oacomf1olem 8577 oeeulem 8615 cofonr 8688 naddcllem 8690 naddov2 8693 naddunif 8708 naddasslem1 8709 naddasslem2 8710 ordtypelem2 9518 cantnfcl 9673 cantnflt 9678 cantnfp1lem3 9686 oemapvali 9690 cantnflem1c 9693 cantnflem1d 9694 cantnflem1 9695 cantnf 9699 cnfcom 9706 cnfcom3lem 9709 infxpenlem 10097 ac10ct 10118 dfac12lem1 10227 dfac12lem2 10228 cfeq0 10339 cfsuc 10340 cff1 10341 cfflb 10342 cofsmo 10352 cfsmolem 10353 alephsing 10359 zorn2lem2 10580 ttukeylem3 10594 ttukeylem5 10596 ttukeylem6 10597 inar1 10865 nosupno 28067 elold 28252 madefi 28306 oldfi 28307 oldfib 28770 dfac15 35811 nmulrid 37040 ltnadd 37061 naddle 37062 ontgval 37313 aomclem6 44168 tfsconcatlem 44445 tfsconcatfv 44450 ofoafo 44465 ofoaid1 44467 ofoaid2 44468 dfno2 44536 |
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