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Mirrors > Home > ILE Home > Th. List > smo0 | GIF version |
Description: The null set is a strictly monotone ordinal function. (Contributed by Andrew Salmon, 20-Nov-2011.) |
Ref | Expression |
---|---|
smo0 | ⊢ Smo ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ord0 4423 | . . 3 ⊢ Ord ∅ | |
2 | 1 | iordsmo 6352 | . 2 ⊢ Smo ( I ↾ ∅) |
3 | res0 4947 | . . 3 ⊢ ( I ↾ ∅) = ∅ | |
4 | smoeq 6345 | . . 3 ⊢ (( I ↾ ∅) = ∅ → (Smo ( I ↾ ∅) ↔ Smo ∅)) | |
5 | 3, 4 | ax-mp 5 | . 2 ⊢ (Smo ( I ↾ ∅) ↔ Smo ∅) |
6 | 2, 5 | mpbi 145 | 1 ⊢ Smo ∅ |
Colors of variables: wff set class |
Syntax hints: ↔ wb 105 = wceq 1364 ∅c0 3447 I cid 4320 ↾ cres 4662 Smo wsmo 6340 |
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-in1 615 ax-in2 616 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-14 2167 ax-ext 2175 ax-sep 4148 ax-pow 4204 ax-pr 4239 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 df-rex 2478 df-v 2762 df-sbc 2987 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-nul 3448 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-br 4031 df-opab 4092 df-tr 4129 df-id 4325 df-iord 4398 df-on 4400 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-rn 4671 df-res 4672 df-ima 4673 df-iota 5216 df-fun 5257 df-fn 5258 df-f 5259 df-fv 5263 df-smo 6341 |
This theorem is referenced by: (None) |
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