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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 6335 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7738 | . 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 3903 Ord word 6324 Oncon0 6325 |
| 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 5243 ax-pr 5379 |
| 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 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-tr 5208 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-ord 6328 df-on 6329 |
| This theorem is referenced by: onuni 7743 onminex 7757 onssi 7790 tfi 7805 soseq 8111 tfr3 8340 tz7.49 8386 tz7.49c 8387 oacomf1olem 8501 oeeulem 8539 cofonr 8612 naddcllem 8614 naddov2 8617 naddunif 8631 naddasslem1 8632 naddasslem2 8633 ordtypelem2 9436 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 27683 elold 27867 madefi 27921 oldfi 27922 oldfib 28385 ontgval 36647 aomclem6 43416 tfsconcatlem 43693 tfsconcatfv 43698 ofoafo 43713 ofoaid1 43715 ofoaid2 43716 dfno2 43784 |
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