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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 6398 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7831 | . 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 2147 ⊆ wss 3900 Ord word 6387 Oncon0 6388 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5255 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-tr 5219 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-ord 6391 df-on 6392 |
| This theorem is used by: onuni 7836 onminex 7850 onssi 7883 tfi 7898 soseq 8213 tfr3 8445 tz7.49 8493 tz7.49c 8494 oacomf1olem 8610 oeeulem 8648 cofonr 8721 naddcllem 8723 naddov2 8726 naddunif 8741 naddasslem1 8742 naddasslem2 8743 ordtypelem2 9550 cantnfcl 9705 cantnflt 9710 cantnfp1lem3 9718 oemapvali 9722 cantnflem1c 9725 cantnflem1d 9726 cantnflem1 9727 cantnf 9731 cnfcom 9738 cnfcom3lem 9741 infxpenlem 10131 ac10ct 10152 dfac12lem1 10261 dfac12lem2 10262 cfeq0 10373 cfsuc 10374 cff1 10375 cfflb 10376 cofsmo 10386 cfsmolem 10387 alephsing 10393 zorn2lem2 10614 ttukeylem3 10628 ttukeylem5 10630 ttukeylem6 10631 inar1 10899 nosupno 28117 elold 28302 madefi 28356 oldfi 28357 oldfib 28820 dfac15 35886 fnlfvk30 36068 fnlfvk3n0 36069 nmulrid 37161 ltnadd 37182 naddle 37183 ontgval 37434 aomclem6 44327 tfsconcatlem 44599 tfsconcatfv 44604 ofoafo 44619 ofoaid1 44621 ofoaid2 44622 dfno2 44690 |
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