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| Mirrors > Home > MPE Home > Th. List > bday0 | Structured version Visualization version GIF version | ||
| Description: Calculate the birthday of surreal zero. (Contributed by Scott Fenton, 7-Aug-2024.) |
| Ref | Expression |
|---|---|
| bday0 | ⊢ ( bday ‘ 0s ) = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-0s 28031 | . . . 4 ⊢ 0s = (∅ |s ∅) | |
| 2 | 1 | fveq2i 6888 | . . 3 ⊢ ( bday ‘ 0s ) = ( bday ‘(∅ |s ∅)) |
| 3 | 0elpw 5328 | . . . 4 ⊢ ∅ ∈ 𝒫 No | |
| 4 | nulsgts 28000 | . . . 4 ⊢ (∅ ∈ 𝒫 No → ∅ <<s ∅) | |
| 5 | cutbday 28008 | . . . 4 ⊢ (∅ <<s ∅ → ( bday ‘(∅ |s ∅)) = ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)})) | |
| 6 | 3, 4, 5 | mp2b 10 | . . 3 ⊢ ( bday ‘(∅ |s ∅)) = ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) |
| 7 | 2, 6 | eqtri 2788 | . 2 ⊢ ( bday ‘ 0s ) = ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) |
| 8 | snelpwi 5427 | . . . . . . . 8 ⊢ (𝑥 ∈ No → {𝑥} ∈ 𝒫 No ) | |
| 9 | nulslts 27999 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → ∅ <<s {𝑥}) | |
| 10 | nulsgts 28000 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → {𝑥} <<s ∅) | |
| 11 | 9, 10 | jca 521 | . . . . . . . 8 ⊢ ({𝑥} ∈ 𝒫 No → (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)) |
| 12 | 8, 11 | syl 18 | . . . . . . 7 ⊢ (𝑥 ∈ No → (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)) |
| 13 | 12 | rabeqc 3430 | . . . . . 6 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = No |
| 14 | bdaydm 27973 | . . . . . 6 ⊢ dom bday = No | |
| 15 | 13, 14 | eqtr4i 2791 | . . . . 5 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = dom bday |
| 16 | 15 | imaeq2i 6062 | . . . 4 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ( bday “ dom bday ) |
| 17 | imadmrn 6074 | . . . 4 ⊢ ( bday “ dom bday ) = ran bday | |
| 18 | bdayrn 27975 | . . . 4 ⊢ ran bday = On | |
| 19 | 16, 17, 18 | 3eqtri 2792 | . . 3 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = On |
| 20 | 19 | inteqi 4918 | . 2 ⊢ ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ∩ On |
| 21 | inton 6424 | . 2 ⊢ ∩ On = ∅ | |
| 22 | 7, 20, 21 | 3eqtri 2792 | 1 ⊢ ( bday ‘ 0s ) = ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2146 {crab 3418 ∅c0 4286 𝒫 cpw 4564 {csn 4591 ∩ cint 4914 class class class wbr 5111 dom cdm 5663 ran crn 5664 “ cima 5666 Oncon0 6364 ‘cfv 6540 (class class class)co 7416 No csur 27835 bday cbday 27837 <<s cslts 27981 |s ccuts 27983 0s c0s 28029 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-tp 4596 df-op 4598 df-uni 4875 df-int 4915 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-ord 6367 df-on 6368 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-1o 8455 df-2o 8456 df-no 27838 df-lts 27839 df-bday 27840 df-slts 27982 df-cuts 27984 df-0s 28031 |
| This theorem is used by: bday0b 28037 bday1 28038 cuteq0 28039 left0s 28117 right0s 28118 0elold 28134 addsproplem2 28194 negsproplem2 28253 negsproplem6 28257 mulsproplem2 28341 mulsproplem3 28342 mulsproplem4 28343 mulsproplem5 28344 mulsproplem6 28345 mulsproplem7 28346 mulsproplem8 28347 mulsproplem12 28351 mulsproplem13 28352 mulsproplem14 28353 n0bday 28576 bdayn0sf1o 28594 bdaypw2n0bndlem 28687 bdaypw2n0bnd 28688 bdayfinbndlem2 28692 |
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