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Mirrors > Home > MPE Home > Th. List > addsf | Structured version Visualization version GIF version |
Description: Function statement for surreal addition. (Contributed by Scott Fenton, 21-Jan-2025.) |
Ref | Expression |
---|---|
addsf | ⊢ +s :( No × No )⟶ No |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | addsfn 27924 | . 2 ⊢ +s Fn ( No × No ) | |
2 | addscl 27944 | . . . 4 ⊢ ((𝑦 ∈ No ∧ 𝑧 ∈ No ) → (𝑦 +s 𝑧) ∈ No ) | |
3 | 2 | rgen2 3187 | . . 3 ⊢ ∀𝑦 ∈ No ∀𝑧 ∈ No (𝑦 +s 𝑧) ∈ No |
4 | fveq2 6896 | . . . . . 6 ⊢ (𝑥 = 〈𝑦, 𝑧〉 → ( +s ‘𝑥) = ( +s ‘〈𝑦, 𝑧〉)) | |
5 | df-ov 7422 | . . . . . 6 ⊢ (𝑦 +s 𝑧) = ( +s ‘〈𝑦, 𝑧〉) | |
6 | 4, 5 | eqtr4di 2783 | . . . . 5 ⊢ (𝑥 = 〈𝑦, 𝑧〉 → ( +s ‘𝑥) = (𝑦 +s 𝑧)) |
7 | 6 | eleq1d 2810 | . . . 4 ⊢ (𝑥 = 〈𝑦, 𝑧〉 → (( +s ‘𝑥) ∈ No ↔ (𝑦 +s 𝑧) ∈ No )) |
8 | 7 | ralxp 5844 | . . 3 ⊢ (∀𝑥 ∈ ( No × No )( +s ‘𝑥) ∈ No ↔ ∀𝑦 ∈ No ∀𝑧 ∈ No (𝑦 +s 𝑧) ∈ No ) |
9 | 3, 8 | mpbir 230 | . 2 ⊢ ∀𝑥 ∈ ( No × No )( +s ‘𝑥) ∈ No |
10 | ffnfv 7128 | . 2 ⊢ ( +s :( No × No )⟶ No ↔ ( +s Fn ( No × No ) ∧ ∀𝑥 ∈ ( No × No )( +s ‘𝑥) ∈ No )) | |
11 | 1, 9, 10 | mpbir2an 709 | 1 ⊢ +s :( No × No )⟶ No |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 ∈ wcel 2098 ∀wral 3050 〈cop 4636 × cxp 5676 Fn wfn 6544 ⟶wf 6545 ‘cfv 6549 (class class class)co 7419 No csur 27618 +s cadds 27922 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5365 ax-pr 5429 ax-un 7741 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2930 df-ral 3051 df-rex 3060 df-rmo 3363 df-reu 3364 df-rab 3419 df-v 3463 df-sbc 3774 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3964 df-nul 4323 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-tp 4635 df-op 4637 df-uni 4910 df-int 4951 df-iun 4999 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-se 5634 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-pred 6307 df-ord 6374 df-on 6375 df-suc 6377 df-iota 6501 df-fun 6551 df-fn 6552 df-f 6553 df-f1 6554 df-fo 6555 df-f1o 6556 df-fv 6557 df-riota 7375 df-ov 7422 df-oprab 7423 df-mpo 7424 df-1st 7994 df-2nd 7995 df-frecs 8287 df-wrecs 8318 df-recs 8392 df-1o 8487 df-2o 8488 df-nadd 8687 df-no 27621 df-slt 27622 df-bday 27623 df-sslt 27760 df-scut 27762 df-0s 27803 df-made 27820 df-old 27821 df-left 27823 df-right 27824 df-norec2 27912 df-adds 27923 |
This theorem is referenced by: addsfo 27946 |
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