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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 5733 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
2 | ordsson 6989 | . 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 1990 ⊆ wss 3574 Ord word 5722 Oncon0 5723 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-tr 4753 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-ord 5726 df-on 5727 |
This theorem is referenced by: predon 6991 onuni 6993 onminex 7007 suceloni 7013 onssi 7037 tfi 7053 tfr3 7495 tz7.49 7540 tz7.49c 7541 oacomf1olem 7644 oeeulem 7681 ordtypelem2 8424 cantnfcl 8564 cantnflt 8569 cantnfp1lem3 8577 oemapvali 8581 cantnflem1c 8584 cantnflem1d 8585 cantnflem1 8586 cantnf 8590 cnfcom 8597 cnfcom3lem 8600 infxpenlem 8836 ac10ct 8857 dfac12lem1 8965 dfac12lem2 8966 cfeq0 9078 cfsuc 9079 cff1 9080 cfflb 9081 cofsmo 9091 cfsmolem 9092 alephsing 9098 zorn2lem2 9319 ttukeylem3 9333 ttukeylem5 9335 ttukeylem6 9336 inar1 9597 soseq 31751 nosupno 31849 ontgval 32430 aomclem6 37629 |
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