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| Mirrors > Home > MPE Home > Th. List > bday0s | Structured version Visualization version GIF version | ||
| Description: Calculate the birthday of surreal zero. (Contributed by Scott Fenton, 7-Aug-2024.) |
| Ref | Expression |
|---|---|
| bday0s | ⊢ ( bday ‘ 0s ) = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-0s 27761 | . . . 4 ⊢ 0s = (∅ |s ∅) | |
| 2 | 1 | fveq2i 6820 | . . 3 ⊢ ( bday ‘ 0s ) = ( bday ‘(∅ |s ∅)) |
| 3 | 0elpw 5292 | . . . 4 ⊢ ∅ ∈ 𝒫 No | |
| 4 | nulssgt 27732 | . . . 4 ⊢ (∅ ∈ 𝒫 No → ∅ <<s ∅) | |
| 5 | scutbday 27738 | . . . 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 2753 | . 2 ⊢ ( bday ‘ 0s ) = ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) |
| 8 | snelpwi 5383 | . . . . . . . 8 ⊢ (𝑥 ∈ No → {𝑥} ∈ 𝒫 No ) | |
| 9 | nulsslt 27731 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → ∅ <<s {𝑥}) | |
| 10 | nulssgt 27732 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → {𝑥} <<s ∅) | |
| 11 | 9, 10 | jca 511 | . . . . . . . 8 ⊢ ({𝑥} ∈ 𝒫 No → (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)) |
| 12 | 8, 11 | syl 17 | . . . . . . 7 ⊢ (𝑥 ∈ No → (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)) |
| 13 | 12 | rabeqc 3405 | . . . . . 6 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = No |
| 14 | bdaydm 27706 | . . . . . 6 ⊢ dom bday = No | |
| 15 | 13, 14 | eqtr4i 2756 | . . . . 5 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = dom bday |
| 16 | 15 | imaeq2i 6004 | . . . 4 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ( bday “ dom bday ) |
| 17 | imadmrn 6016 | . . . 4 ⊢ ( bday “ dom bday ) = ran bday | |
| 18 | bdayrn 27707 | . . . 4 ⊢ ran bday = On | |
| 19 | 16, 17, 18 | 3eqtri 2757 | . . 3 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = On |
| 20 | 19 | inteqi 4899 | . 2 ⊢ ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ∩ On |
| 21 | inton 6361 | . 2 ⊢ ∩ On = ∅ | |
| 22 | 7, 20, 21 | 3eqtri 2757 | 1 ⊢ ( bday ‘ 0s ) = ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1541 ∈ wcel 2110 {crab 3393 ∅c0 4281 𝒫 cpw 4548 {csn 4574 ∩ cint 4895 class class class wbr 5089 dom cdm 5614 ran crn 5615 “ cima 5617 Oncon0 6302 ‘cfv 6477 (class class class)co 7341 No csur 27571 bday cbday 27573 <<s csslt 27713 |s cscut 27715 0s c0s 27759 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2112 ax-9 2120 ax-10 2143 ax-11 2159 ax-12 2179 ax-ext 2702 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7663 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-rmo 3344 df-reu 3345 df-rab 3394 df-v 3436 df-sbc 3740 df-csb 3849 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-pss 3920 df-nul 4282 df-if 4474 df-pw 4550 df-sn 4575 df-pr 4577 df-tp 4579 df-op 4581 df-uni 4858 df-int 4896 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-ord 6305 df-on 6306 df-suc 6308 df-iota 6433 df-fun 6479 df-fn 6480 df-f 6481 df-f1 6482 df-fo 6483 df-f1o 6484 df-fv 6485 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-1o 8380 df-2o 8381 df-no 27574 df-slt 27575 df-bday 27576 df-sslt 27714 df-scut 27716 df-0s 27761 |
| This theorem is referenced by: bday0b 27767 bday1s 27768 cuteq0 27769 left0s 27831 right0s 27832 0elold 27848 addsproplem2 27906 negsproplem2 27964 negsproplem6 27968 mulsproplem2 28049 mulsproplem3 28050 mulsproplem4 28051 mulsproplem5 28052 mulsproplem6 28053 mulsproplem7 28054 mulsproplem8 28055 mulsproplem12 28059 mulsproplem13 28060 mulsproplem14 28061 n0sbday 28273 bdayn0sf1o 28288 |
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