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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 7730 | . 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 2114 ⊆ wss 3890 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 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5231 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-tr 5194 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 7735 onminex 7749 onssi 7782 tfi 7797 soseq 8102 tfr3 8331 tz7.49 8377 tz7.49c 8378 oacomf1olem 8492 oeeulem 8530 cofonr 8603 naddcllem 8605 naddov2 8608 naddunif 8622 naddasslem1 8623 naddasslem2 8624 ordtypelem2 9427 cantnfcl 9579 cantnflt 9584 cantnfp1lem3 9592 oemapvali 9596 cantnflem1c 9599 cantnflem1d 9600 cantnflem1 9601 cantnf 9605 cnfcom 9612 cnfcom3lem 9615 infxpenlem 9926 ac10ct 9947 dfac12lem1 10057 dfac12lem2 10058 cfeq0 10169 cfsuc 10170 cff1 10171 cfflb 10172 cofsmo 10182 cfsmolem 10183 alephsing 10189 zorn2lem2 10410 ttukeylem3 10424 ttukeylem5 10426 ttukeylem6 10427 inar1 10689 nosupno 27681 elold 27865 madefi 27919 oldfi 27920 oldfib 28383 ontgval 36629 aomclem6 43505 tfsconcatlem 43782 tfsconcatfv 43787 ofoafo 43802 ofoaid1 43804 ofoaid2 43805 dfno2 43873 |
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