| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 28199 | . . . 4 ⊢ 0s = (∅ |s ∅) | |
| 2 | 1 | fveq2i 6889 | . . 3 ⊢ (bday‘ 0s ) = (bday‘(∅ |s ∅)) |
| 3 | 0elpw 5316 | . . . 4 ⊢ ∅ ∈ 𝒫 No | |
| 4 | nulsgts 28168 | . . . 4 ⊢ (∅ ∈ 𝒫 No → ∅ <<s ∅) | |
| 5 | cutbday 28176 | . . . 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 5411 | . . . . . . . 8 ⊢ (𝑥 ∈ No → {𝑥} ∈ 𝒫 No) | |
| 9 | nulslts 28167 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → ∅ <<s {𝑥}) | |
| 10 | nulsgts 28168 | . . . . . . . . 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 28141 | . . . . . 6 ⊢ dom bday = No | |
| 15 | 13, 14 | eqtr4i 2786 | . . . . 5 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = dom bday |
| 16 | 15 | imaeq2i 6049 | . . . 4 ⊢ (bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = (bday “ dom bday) |
| 17 | imadmrn 6066 | . . . 4 ⊢ (bday “ dom bday) = ran bday | |
| 18 | bdayrn 28143 | . . . 4 ⊢ ran bday = On | |
| 19 | 16, 17, 18 | 3eqtri 2787 | . . 3 ⊢ (bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = On |
| 20 | 19 | inteqi 4910 | . 2 ⊢ ∩ (bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ∩ On |
| 21 | inton 6422 | . 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 1569 ∈ wcel 2144 {crab 3412 ∅c0 4278 𝒫 cpw 4556 {csn 4584 ∩ cint 4906 class class class wbr 5102 dom cdm 5650 ran crn 5651 “ cima 5653 Oncon0 6362 ‘cfv 6539 (class class class)co 7421 Nocsur 28003 bdaycbday 28005 <<s cslts 28149 |s ccuts 28151 0s c0s 28197 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7752 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-uni 4867 df-int 4907 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-ord 6365 df-on 6366 df-suc 6368 df-iota 6494 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-1o 8480 df-2o 8481 df-no 28006 df-lts 28007 df-bday 28008 df-slts 28150 df-cuts 28152 df-0s 28199 |
| This theorem is used by: bday0b 28205 bday1 28206 cuteq0 28207 left0s 28285 right0s 28286 0elold 28302 addsproplem2 28362 negsproplem2 28421 negsproplem6 28425 mulsproplem2 28509 mulsproplem3 28510 mulsproplem4 28511 mulsproplem5 28512 mulsproplem6 28513 mulsproplem7 28514 mulsproplem8 28515 mulsproplem12 28519 mulsproplem13 28520 mulsproplem14 28521 n0bday 28744 bdayn0sf1o 28762 bdaypw2n0bndlem 28855 bdaypw2n0bnd 28856 bdayfinbndlem2 28860 |
| Copyright terms: Public domain | W3C validator |