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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 6367 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7782 | . 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 2145 ⊆ wss 3899 Ord word 6356 Oncon0 6357 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 ax-sep 5251 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 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-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-tr 5213 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-ord 6360 df-on 6361 |
| This theorem is used by: onuni 7787 onminex 7801 onssi 7834 tfi 7849 soseq 8157 tfr3 8388 tz7.49 8434 tz7.49c 8435 oacomf1olem 8551 oeeulem 8589 cofonr 8662 naddcllem 8664 naddov2 8667 naddunif 8682 naddasslem1 8683 naddasslem2 8684 ordtypelem2 9491 cantnfcl 9646 cantnflt 9651 cantnfp1lem3 9659 oemapvali 9663 cantnflem1c 9666 cantnflem1d 9667 cantnflem1 9668 cantnf 9672 cnfcom 9679 cnfcom3lem 9682 infxpenlem 10016 ac10ct 10037 dfac12lem1 10146 dfac12lem2 10147 cfeq0 10258 cfsuc 10259 cff1 10260 cfflb 10261 cofsmo 10271 cfsmolem 10272 alephsing 10278 zorn2lem2 10499 ttukeylem3 10513 ttukeylem5 10515 ttukeylem6 10516 inar1 10784 nosupno 27939 elold 28124 madefi 28178 oldfi 28179 oldfib 28642 nmulrid 36777 ltnadd 36798 naddle 36799 ontgval 37050 aomclem6 43900 tfsconcatlem 44177 tfsconcatfv 44182 ofoafo 44197 ofoaid1 44199 ofoaid2 44200 dfno2 44268 |
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