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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 6333 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7737 | . 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 3889 Ord word 6322 Oncon0 6323 |
| 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 2708 ax-sep 5231 ax-pr 5375 |
| 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 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-tr 5193 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-ord 6326 df-on 6327 |
| This theorem is referenced by: onuni 7742 onminex 7756 onssi 7789 tfi 7804 soseq 8109 tfr3 8338 tz7.49 8384 tz7.49c 8385 oacomf1olem 8499 oeeulem 8537 cofonr 8610 naddcllem 8612 naddov2 8615 naddunif 8629 naddasslem1 8630 naddasslem2 8631 ordtypelem2 9434 cantnfcl 9588 cantnflt 9593 cantnfp1lem3 9601 oemapvali 9605 cantnflem1c 9608 cantnflem1d 9609 cantnflem1 9610 cantnf 9614 cnfcom 9621 cnfcom3lem 9624 infxpenlem 9935 ac10ct 9956 dfac12lem1 10066 dfac12lem2 10067 cfeq0 10178 cfsuc 10179 cff1 10180 cfflb 10181 cofsmo 10191 cfsmolem 10192 alephsing 10198 zorn2lem2 10419 ttukeylem3 10433 ttukeylem5 10435 ttukeylem6 10436 inar1 10698 nosupno 27667 elold 27851 madefi 27905 oldfi 27906 oldfib 28369 ontgval 36613 aomclem6 43487 tfsconcatlem 43764 tfsconcatfv 43769 ofoafo 43784 ofoaid1 43786 ofoaid2 43787 dfno2 43855 |
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