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| Description: Corollary 7.8 of [TakeutiZaring] p. 37. |
| Ref | Expression |
|---|---|
| ordelssne |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tz7.7 2973 |
. . 3
| |
| 2 | ordtr 2962 |
. . 3
| |
| 3 | 1, 2 | sylan2 451 |
. 2
|
| 4 | 3 | ancoms 436 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ordelpss 2975 ordsseleq 2976 ordsson 2991 onelpsst 2998 orduniorsuc 3087 ominfOLD 4529 |
| 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-11 967 ax-12 968 ax-13 969 ax-14 970 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 ax-sep 2703 ax-pow 2742 ax-pr 2779 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 776 df-3an 777 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 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-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-uni 2504 df-br 2620 df-opab 2667 df-tr 2681 df-eprel 2832 df-po 2840 df-so 2850 df-fr 2917 df-we 2934 df-ord 2951 |