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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 6371 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7781 | . 2 ⊢ (Ord 𝐴 → 𝐴 ⊆ On) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐴 ∈ On → 𝐴 ⊆ On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2149 ⊆ wss 3913 Ord word 6360 Oncon0 6361 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-tr 5223 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-ord 6364 df-on 6365 |
| This theorem is referenced by: onuni 7786 onminex 7800 onssi 7833 tfi 7848 soseq 8154 tfr3 8385 tz7.49 8431 tz7.49c 8432 oacomf1olem 8548 oeeulem 8586 cofonr 8659 naddcllem 8661 naddov2 8664 naddunif 8679 naddasslem1 8680 naddasslem2 8681 ordtypelem2 9480 cantnfcl 9635 cantnflt 9640 cantnfp1lem3 9648 oemapvali 9652 cantnflem1c 9655 cantnflem1d 9656 cantnflem1 9657 cantnf 9661 cnfcom 9668 cnfcom3lem 9671 infxpenlem 9996 ac10ct 10017 dfac12lem1 10126 dfac12lem2 10127 cfeq0 10239 cfsuc 10240 cff1 10241 cfflb 10242 cofsmo 10252 cfsmolem 10253 alephsing 10259 zorn2lem2 10480 ttukeylem3 10494 ttukeylem5 10496 ttukeylem6 10497 inar1 10759 nosupno 27832 elold 28017 madefi 28071 oldfi 28072 oldfib 28535 ontgval 36830 aomclem6 43677 tfsconcatlem 43954 tfsconcatfv 43959 ofoafo 43974 ofoaid1 43976 ofoaid2 43977 dfno2 44045 |
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