| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: An ordinal number is an ordinal set. |
| Ref | Expression |
|---|---|
| elon.1 |
|
| Ref | Expression |
|---|---|
| elon |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elon.1 |
. 2
| |
| 2 | elong 2983 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: tron 2998 onfr 3014 0elon 3026 ssorduni 3147 dfom2 3220 omsson 3223 rdglim2 4250 isfinite2 4692 r1ord 4801 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-10 1002 ax-12 1004 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 |
| This theorem depends on definitions: df-bi 145 df-or 222 df-an 223 df-3an 783 df-ex 1017 df-sb 1209 df-clab 1506 df-cleq 1511 df-clel 1514 df-ral 1695 df-rex 1696 df-v 1858 df-dif 2101 df-un 2102 df-in 2103 df-ss 2105 df-nul 2333 df-sn 2470 df-pr 2471 df-op 2474 df-uni 2570 df-br 2693 df-tr 2755 df-po 2918 df-so 2929 df-fr 2947 df-we 2962 df-ord 2978 df-on 2979 |