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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 28193 | . . . 4 ⊢ 0s = (∅ |s ∅) | |
| 2 | 1 | fveq2i 6888 | . . 3 ⊢ (bday‘ 0s ) = (bday‘(∅ |s ∅)) |
| 3 | 0elpw 5317 | . . . 4 ⊢ ∅ ∈ 𝒫 No | |
| 4 | nulsgts 28162 | . . . 4 ⊢ (∅ ∈ 𝒫 No → ∅ <<s ∅) | |
| 5 | cutbday 28170 | . . . 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 2784 | . 2 ⊢ (bday‘ 0s ) = ∩ (bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) |
| 8 | snelpwi 5412 | . . . . . . . 8 ⊢ (𝑥 ∈ No → {𝑥} ∈ 𝒫 No) | |
| 9 | nulslts 28161 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → ∅ <<s {𝑥}) | |
| 10 | nulsgts 28162 | . . . . . . . . 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 3425 | . . . . . 6 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = No |
| 14 | bdaydm 28135 | . . . . . 6 ⊢ dom bday = No | |
| 15 | 13, 14 | eqtr4i 2787 | . . . . 5 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = dom bday |
| 16 | 15 | imaeq2i 6050 | . . . 4 ⊢ (bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = (bday “ dom bday) |
| 17 | imadmrn 6067 | . . . 4 ⊢ (bday “ dom bday) = ran bday | |
| 18 | bdayrn 28137 | . . . 4 ⊢ ran bday = On | |
| 19 | 16, 17, 18 | 3eqtri 2788 | . . 3 ⊢ (bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = On |
| 20 | 19 | inteqi 4911 | . 2 ⊢ ∩ (bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ∩ On |
| 21 | inton 6422 | . 2 ⊢ ∩ On = ∅ | |
| 22 | 7, 20, 21 | 3eqtri 2788 | 1 ⊢ (bday‘ 0s ) = ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2145 {crab 3413 ∅c0 4279 𝒫 cpw 4557 {csn 4584 ∩ cint 4907 class class class wbr 5103 dom cdm 5651 ran crn 5652 “ cima 5654 Oncon0 6362 ‘cfv 6538 (class class class)co 7420 Nocsur 27997 bdaycbday 27999 <<s cslts 28143 |s ccuts 28145 0s c0s 28191 |
| 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 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 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 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ord 6365 df-on 6366 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1o 8476 df-2o 8477 df-no 28000 df-lts 28001 df-bday 28002 df-slts 28144 df-cuts 28146 df-0s 28193 |
| This theorem is used by: bday0b 28199 bday1 28200 cuteq0 28201 left0s 28279 right0s 28280 0elold 28296 addsproplem2 28356 negsproplem2 28415 negsproplem6 28419 mulsproplem2 28503 mulsproplem3 28504 mulsproplem4 28505 mulsproplem5 28506 mulsproplem6 28507 mulsproplem7 28508 mulsproplem8 28509 mulsproplem12 28513 mulsproplem13 28514 mulsproplem14 28515 n0bday 28738 bdayn0sf1o 28756 bdaypw2n0bndlem 28849 bdaypw2n0bnd 28850 bdayfinbndlem2 28854 |
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