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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 6370 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7778 | . 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 2143 ⊆ wss 3905 Ord word 6359 Oncon0 6360 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-tr 5219 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-ord 6363 df-on 6364 |
| This theorem is referenced by: onuni 7783 onminex 7797 onssi 7830 tfi 7845 soseq 8151 tfr3 8382 tz7.49 8428 tz7.49c 8429 oacomf1olem 8545 oeeulem 8583 cofonr 8656 naddcllem 8658 naddov2 8661 naddunif 8676 naddasslem1 8677 naddasslem2 8678 ordtypelem2 9477 cantnfcl 9632 cantnflt 9637 cantnfp1lem3 9645 oemapvali 9649 cantnflem1c 9652 cantnflem1d 9653 cantnflem1 9654 cantnf 9658 cnfcom 9665 cnfcom3lem 9668 infxpenlem 9993 ac10ct 10014 dfac12lem1 10123 dfac12lem2 10124 cfeq0 10235 cfsuc 10236 cff1 10237 cfflb 10238 cofsmo 10248 cfsmolem 10249 alephsing 10255 zorn2lem2 10476 ttukeylem3 10490 ttukeylem5 10492 ttukeylem6 10493 inar1 10755 nosupno 27867 elold 28052 madefi 28106 oldfi 28107 oldfib 28570 ltnadd 36695 naddle 36696 nmulrid 36697 ontgval 36942 aomclem6 43786 tfsconcatlem 44063 tfsconcatfv 44068 ofoafo 44083 ofoaid1 44085 ofoaid2 44086 dfno2 44154 |
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