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| Mirrors > Home > MPE Home > Th. List > n0ssoldg | Structured version Visualization version GIF version | ||
| Description: The non-negative surreal integers are a subset of the old set of ω. To avoid the axiom of infinity, we include it as an antecedent. (Contributed by Scott Fenton, 20-Feb-2026.) |
| Ref | Expression |
|---|---|
| n0ssoldg | ⊢ (ω ∈ V → ℕ0s ⊆ ( O ‘ω)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | n0no 28337 | . . . 4 ⊢ (𝑥 ∈ ℕ0s → 𝑥 ∈ No ) | |
| 2 | n0bday 28366 | . . . 4 ⊢ (𝑥 ∈ ℕ0s → ( bday ‘𝑥) ∈ ω) | |
| 3 | 1, 2 | jca 517 | . . 3 ⊢ (𝑥 ∈ ℕ0s → (𝑥 ∈ No ∧ ( bday ‘𝑥) ∈ ω)) |
| 4 | omelon2 7823 | . . . . 5 ⊢ (ω ∈ V → ω ∈ On) | |
| 5 | oldbday 27915 | . . . . . . 7 ⊢ ((ω ∈ On ∧ 𝑥 ∈ No ) → (𝑥 ∈ ( O ‘ω) ↔ ( bday ‘𝑥) ∈ ω)) | |
| 6 | 5 | biimprd 250 | . . . . . 6 ⊢ ((ω ∈ On ∧ 𝑥 ∈ No ) → (( bday ‘𝑥) ∈ ω → 𝑥 ∈ ( O ‘ω))) |
| 7 | 6 | ex 414 | . . . . 5 ⊢ (ω ∈ On → (𝑥 ∈ No → (( bday ‘𝑥) ∈ ω → 𝑥 ∈ ( O ‘ω)))) |
| 8 | 4, 7 | syl 17 | . . . 4 ⊢ (ω ∈ V → (𝑥 ∈ No → (( bday ‘𝑥) ∈ ω → 𝑥 ∈ ( O ‘ω)))) |
| 9 | 8 | impd 412 | . . 3 ⊢ (ω ∈ V → ((𝑥 ∈ No ∧ ( bday ‘𝑥) ∈ ω) → 𝑥 ∈ ( O ‘ω))) |
| 10 | 3, 9 | syl5 34 | . 2 ⊢ (ω ∈ V → (𝑥 ∈ ℕ0s → 𝑥 ∈ ( O ‘ω))) |
| 11 | 10 | ssrdv 3923 | 1 ⊢ (ω ∈ V → ℕ0s ⊆ ( O ‘ω)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 397 ∈ wcel 2121 Vcvv 3433 ⊆ wss 3885 Oncon0 6314 ‘cfv 6489 ωcom 7810 No csur 27625 bday cbday 27627 O cold 27837 ℕ0scn0s 28326 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7682 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-ot 4567 df-uni 4842 df-int 4881 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-se 5575 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-nadd 8596 df-no 27628 df-lts 27629 df-bday 27630 df-les 27731 df-slts 27772 df-cuts 27774 df-0s 27821 df-1s 27822 df-made 27841 df-old 27842 df-left 27844 df-right 27845 df-norec 27952 df-norec2 27963 df-adds 27974 df-negs 28035 df-subs 28036 df-n0s 28328 |
| This theorem is referenced by: n0ssold 28368 oldfib 28391 |
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