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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 28072 | . . . 4 ⊢ 0s = (∅ |s ∅) | |
| 2 | 1 | fveq2i 6881 | . . 3 ⊢ ( bday ‘ 0s ) = ( bday ‘(∅ |s ∅)) |
| 3 | 0elpw 5320 | . . . 4 ⊢ ∅ ∈ 𝒫 No | |
| 4 | nulsgts 28041 | . . . 4 ⊢ (∅ ∈ 𝒫 No → ∅ <<s ∅) | |
| 5 | cutbday 28049 | . . . 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 2783 | . 2 ⊢ ( bday ‘ 0s ) = ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) |
| 8 | snelpwi 5419 | . . . . . . . 8 ⊢ (𝑥 ∈ No → {𝑥} ∈ 𝒫 No ) | |
| 9 | nulslts 28040 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → ∅ <<s {𝑥}) | |
| 10 | nulsgts 28041 | . . . . . . . . 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 3424 | . . . . . 6 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = No |
| 14 | bdaydm 28014 | . . . . . 6 ⊢ dom bday = No | |
| 15 | 13, 14 | eqtr4i 2786 | . . . . 5 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = dom bday |
| 16 | 15 | imaeq2i 6054 | . . . 4 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ( bday “ dom bday ) |
| 17 | imadmrn 6066 | . . . 4 ⊢ ( bday “ dom bday ) = ran bday | |
| 18 | bdayrn 28016 | . . . 4 ⊢ ran bday = On | |
| 19 | 16, 17, 18 | 3eqtri 2787 | . . 3 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = On |
| 20 | 19 | inteqi 4911 | . 2 ⊢ ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ∩ On |
| 21 | inton 6417 | . 2 ⊢ ∩ On = ∅ | |
| 22 | 7, 20, 21 | 3eqtri 2787 | 1 ⊢ ( bday ‘ 0s ) = ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2145 {crab 3412 ∅c0 4279 𝒫 cpw 4557 {csn 4584 ∩ cint 4907 class class class wbr 5103 dom cdm 5655 ran crn 5656 “ cima 5658 Oncon0 6357 ‘cfv 6533 (class class class)co 7413 No csur 27876 bday cbday 27878 <<s cslts 28022 |s ccuts 28024 0s c0s 28070 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-ord 6360 df-on 6361 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-1o 8455 df-2o 8456 df-no 27879 df-lts 27880 df-bday 27881 df-slts 28023 df-cuts 28025 df-0s 28072 |
| This theorem is used by: bday0b 28078 bday1 28079 cuteq0 28080 left0s 28158 right0s 28159 0elold 28175 addsproplem2 28235 negsproplem2 28294 negsproplem6 28298 mulsproplem2 28382 mulsproplem3 28383 mulsproplem4 28384 mulsproplem5 28385 mulsproplem6 28386 mulsproplem7 28387 mulsproplem8 28388 mulsproplem12 28392 mulsproplem13 28393 mulsproplem14 28394 n0bday 28617 bdayn0sf1o 28635 bdaypw2n0bndlem 28728 bdaypw2n0bnd 28729 bdayfinbndlem2 28733 |
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