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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 6374 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | ordsson 7788 | . 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 2146 ⊆ wss 3906 Ord word 6363 Oncon0 6364 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-pr 5406 |
| 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 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-tr 5221 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-ord 6367 df-on 6368 |
| This theorem is used by: onuni 7793 onminex 7807 onssi 7840 tfi 7855 soseq 8161 tfr3 8392 tz7.49 8438 tz7.49c 8439 oacomf1olem 8555 oeeulem 8593 cofonr 8666 naddcllem 8668 naddov2 8671 naddunif 8686 naddasslem1 8687 naddasslem2 8688 ordtypelem2 9488 cantnfcl 9643 cantnflt 9648 cantnfp1lem3 9656 oemapvali 9660 cantnflem1c 9663 cantnflem1d 9664 cantnflem1 9665 cantnf 9669 cnfcom 9676 cnfcom3lem 9679 infxpenlem 10013 ac10ct 10034 dfac12lem1 10143 dfac12lem2 10144 cfeq0 10255 cfsuc 10256 cff1 10257 cfflb 10258 cofsmo 10268 cfsmolem 10269 alephsing 10275 zorn2lem2 10496 ttukeylem3 10510 ttukeylem5 10512 ttukeylem6 10513 inar1 10775 nosupno 27918 elold 28103 madefi 28157 oldfi 28158 oldfib 28621 nmulrid 36726 ltnadd 36747 naddle 36748 ontgval 36999 aomclem6 43844 tfsconcatlem 44121 tfsconcatfv 44126 ofoafo 44141 ofoaid1 44143 ofoaid2 44144 dfno2 44212 |
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