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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 6327 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7728 | . 2 ⊢ (Ord 𝐴 → 𝐴 ⊆ On) | |
| 3 | 1, 2 | syl 17 | 1 ⊢ (𝐴 ∈ On → 𝐴 ⊆ On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 ⊆ wss 3901 Ord word 6316 Oncon0 6317 |
| 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 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-tr 5206 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-ord 6320 df-on 6321 |
| This theorem is referenced by: onuni 7733 onminex 7747 onssi 7780 tfi 7795 soseq 8101 tfr3 8330 tz7.49 8376 tz7.49c 8377 oacomf1olem 8491 oeeulem 8529 cofonr 8602 naddcllem 8604 naddov2 8607 naddunif 8621 naddasslem1 8622 naddasslem2 8623 ordtypelem2 9424 cantnfcl 9576 cantnflt 9581 cantnfp1lem3 9589 oemapvali 9593 cantnflem1c 9596 cantnflem1d 9597 cantnflem1 9598 cantnf 9602 cnfcom 9609 cnfcom3lem 9612 infxpenlem 9923 ac10ct 9944 dfac12lem1 10054 dfac12lem2 10055 cfeq0 10166 cfsuc 10167 cff1 10168 cfflb 10169 cofsmo 10179 cfsmolem 10180 alephsing 10186 zorn2lem2 10407 ttukeylem3 10421 ttukeylem5 10423 ttukeylem6 10424 inar1 10686 nosupno 27671 elold 27855 madefi 27909 oldfi 27910 oldfib 28373 ontgval 36625 aomclem6 43301 tfsconcatlem 43578 tfsconcatfv 43583 ofoafo 43598 ofoaid1 43600 ofoaid2 43601 dfno2 43669 |
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