| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: An ordinal number is an ordinal class. |
| Ref | Expression |
|---|---|
| on.1 |
|
| Ref | Expression |
|---|---|
| onord |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | on.1 |
. 2
| |
| 2 | eloni 2958 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ontrc 3096 onirr 3097 onuniorsuc 3107 onun 3110 onsucss 3111 oawordeulem 4188 rankel 4680 bndrank 4682 rankpr 4692 rankuniss 4701 rankelpr 4708 rankelop 4709 rankxplim3 4714 rankxpsuc 4715 cardlim 4851 carduni 4858 alephfp 4900 cda1en 4926 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 777 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-ral 1649 df-rex 1650 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-sn 2412 df-pr 2413 df-op 2416 df-uni 2504 df-br 2620 df-tr 2681 df-po 2840 df-so 2850 df-fr 2917 df-we 2934 df-ord 2951 df-on 2952 |