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Mirrors > Home > ILE Home > Th. List > ordeq | Unicode version |
Description: Equality theorem for the ordinal predicate. (Contributed by NM, 17-Sep-1993.) |
Ref | Expression |
---|---|
ordeq |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | treq 4125 |
. . 3
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2 | raleq 2686 |
. . 3
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3 | 1, 2 | anbi12d 473 |
. 2
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4 | dford3 4388 |
. 2
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5 | dford3 4388 |
. 2
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6 | 3, 4, 5 | 3bitr4g 223 |
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-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-in 3150 df-ss 3157 df-uni 3828 df-tr 4120 df-iord 4387 |
This theorem is referenced by: elong 4394 limeq 4398 ordelord 4402 ordtriexmidlem 4539 2ordpr 4544 issmo 6317 issmo2 6318 smoeq 6319 smores 6321 smores2 6323 smodm2 6324 smoiso 6331 tfrlem8 6347 tfri1dALT 6380 |
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