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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 4488 | . . 3 ⊢ Ord ∅ | |
| 2 | 1 | iordsmo 6462 | . 2 ⊢ Smo ( I ↾ ∅) |
| 3 | res0 5017 | . . 3 ⊢ ( I ↾ ∅) = ∅ | |
| 4 | smoeq 6455 | . . 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 1397 ∅c0 3494 I cid 4385 ↾ cres 4727 Smo wsmo 6450 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-tr 4188 df-id 4390 df-iord 4463 df-on 4465 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-fv 5334 df-smo 6451 |
| This theorem is referenced by: (None) |
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