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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 27805 | . . . 4 ⊢ 0s = (∅ |s ∅) | |
| 2 | 1 | fveq2i 6838 | . . 3 ⊢ ( bday ‘ 0s ) = ( bday ‘(∅ |s ∅)) |
| 3 | 0elpw 5302 | . . . 4 ⊢ ∅ ∈ 𝒫 No | |
| 4 | nulssgt 27776 | . . . 4 ⊢ (∅ ∈ 𝒫 No → ∅ <<s ∅) | |
| 5 | scutbday 27782 | . . . 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 2760 | . 2 ⊢ ( bday ‘ 0s ) = ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) |
| 8 | snelpwi 5393 | . . . . . . . 8 ⊢ (𝑥 ∈ No → {𝑥} ∈ 𝒫 No ) | |
| 9 | nulsslt 27775 | . . . . . . . . 9 ⊢ ({𝑥} ∈ 𝒫 No → ∅ <<s {𝑥}) | |
| 10 | nulssgt 27776 | . . . . . . . . 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 3412 | . . . . . 6 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = No |
| 14 | bdaydm 27750 | . . . . . 6 ⊢ dom bday = No | |
| 15 | 13, 14 | eqtr4i 2763 | . . . . 5 ⊢ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)} = dom bday |
| 16 | 15 | imaeq2i 6018 | . . . 4 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ( bday “ dom bday ) |
| 17 | imadmrn 6030 | . . . 4 ⊢ ( bday “ dom bday ) = ran bday | |
| 18 | bdayrn 27751 | . . . 4 ⊢ ran bday = On | |
| 19 | 16, 17, 18 | 3eqtri 2764 | . . 3 ⊢ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = On |
| 20 | 19 | inteqi 4907 | . 2 ⊢ ∩ ( bday “ {𝑥 ∈ No ∣ (∅ <<s {𝑥} ∧ {𝑥} <<s ∅)}) = ∩ On |
| 21 | inton 6377 | . 2 ⊢ ∩ On = ∅ | |
| 22 | 7, 20, 21 | 3eqtri 2764 | 1 ⊢ ( bday ‘ 0s ) = ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1542 ∈ wcel 2114 {crab 3400 ∅c0 4286 𝒫 cpw 4555 {csn 4581 ∩ cint 4903 class class class wbr 5099 dom cdm 5625 ran crn 5626 “ cima 5628 Oncon0 6318 ‘cfv 6493 (class class class)co 7360 No csur 27611 bday cbday 27613 <<s csslt 27757 |s cscut 27759 0s c0s 27803 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-tp 4586 df-op 4588 df-uni 4865 df-int 4904 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-ord 6321 df-on 6322 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1o 8399 df-2o 8400 df-no 27614 df-slt 27615 df-bday 27616 df-sslt 27758 df-scut 27760 df-0s 27805 |
| This theorem is referenced by: bday0b 27811 bday1s 27812 cuteq0 27813 left0s 27875 right0s 27876 0elold 27892 addsproplem2 27952 negsproplem2 28011 negsproplem6 28015 mulsproplem2 28099 mulsproplem3 28100 mulsproplem4 28101 mulsproplem5 28102 mulsproplem6 28103 mulsproplem7 28104 mulsproplem8 28105 mulsproplem12 28109 mulsproplem13 28110 mulsproplem14 28111 n0sbday 28332 bdayn0sf1o 28349 bdaypw2n0sbndlem 28442 bdaypw2n0sbnd 28443 bdayfinbndlem2 28447 |
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