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Mirrors > Home > MPE Home > Th. List > Mathboxes > old0 | Structured version Visualization version GIF version |
Description: No surreal is older than ∅. (Contributed by Scott Fenton, 7-Aug-2024.) |
Ref | Expression |
---|---|
old0 | ⊢ ( O ‘∅) = ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0elon 6284 | . . 3 ⊢ ∅ ∈ On | |
2 | oldval 33801 | . . 3 ⊢ (∅ ∈ On → ( O ‘∅) = ∪ ( M “ ∅)) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ ( O ‘∅) = ∪ ( M “ ∅) |
4 | ima0 5960 | . . 3 ⊢ ( M “ ∅) = ∅ | |
5 | 4 | unieqi 4847 | . 2 ⊢ ∪ ( M “ ∅) = ∪ ∅ |
6 | uni0 4864 | . 2 ⊢ ∪ ∅ = ∅ | |
7 | 3, 5, 6 | 3eqtri 2770 | 1 ⊢ ( O ‘∅) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1543 ∈ wcel 2111 ∅c0 4252 ∪ cuni 4834 “ cima 5569 Oncon0 6231 ‘cfv 6398 M cmade 33789 O cold 33790 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2159 ax-12 2176 ax-ext 2709 ax-rep 5194 ax-sep 5207 ax-nul 5214 ax-pr 5337 ax-un 7542 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2072 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2887 df-ne 2942 df-ral 3067 df-rex 3068 df-reu 3069 df-rab 3071 df-v 3423 df-sbc 3710 df-csb 3827 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4253 df-if 4455 df-pw 4530 df-sn 4557 df-pr 4559 df-tp 4561 df-op 4563 df-uni 4835 df-iun 4921 df-br 5069 df-opab 5131 df-mpt 5151 df-tr 5177 df-id 5470 df-eprel 5475 df-po 5483 df-so 5484 df-fr 5524 df-we 5526 df-xp 5572 df-rel 5573 df-cnv 5574 df-co 5575 df-dm 5576 df-rn 5577 df-res 5578 df-ima 5579 df-pred 6176 df-ord 6234 df-on 6235 df-suc 6237 df-iota 6356 df-fun 6400 df-fn 6401 df-f 6402 df-f1 6403 df-fo 6404 df-f1o 6405 df-fv 6406 df-wrecs 8068 df-recs 8129 df-made 33794 df-old 33795 |
This theorem is referenced by: leftval 33810 rightval 33811 new0 33821 left0s 33838 right0s 33839 lrold 33840 |
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