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Mirrors > Home > ILE Home > Th. List > ordsucg | Unicode version |
Description: The successor of an ordinal class is ordinal. (Contributed by Jim Kingdon, 20-Nov-2018.) |
Ref | Expression |
---|---|
ordsucg |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ordsucim 4520 |
. 2
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2 | sucidg 4437 |
. . 3
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3 | ordelord 4402 |
. . . 4
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4 | 3 | ex 115 |
. . 3
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5 | 2, 4 | syl5com 29 |
. 2
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6 | 1, 5 | impbid2 143 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2171 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ral 2473 df-rex 2474 df-v 2754 df-un 3148 df-in 3150 df-ss 3157 df-sn 3616 df-uni 3828 df-tr 4120 df-iord 4387 df-suc 4392 |
This theorem is referenced by: onsucb 4523 |
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