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| Mirrors > Home > MPE Home > Th. List > leadds1d | Structured version Visualization version GIF version | ||
| Description: Addition to both sides of surreal less-than or equal. Theorem 5 of [Conway] p. 18. (Contributed by Scott Fenton, 21-Jan-2025.) |
| Ref | Expression |
|---|---|
| addscand.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| addscand.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| addscand.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| Ref | Expression |
|---|---|
| leadds1d | ⊢ (𝜑 → (𝐴 ≤s 𝐵 ↔ (𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | addscand.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | addscand.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | addscand.3 | . 2 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 4 | leadds1 28357 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → (𝐴 ≤s 𝐵 ↔ (𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶))) | |
| 5 | 1, 2, 3, 4 | syl3anc 1398 | 1 ⊢ (𝜑 → (𝐴 ≤s 𝐵 ↔ (𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∈ wcel 2145 class class class wbr 5103 (class class class)co 7412 No csur 27979 ≤s cles 28083 +s cadds 28327 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-ot 4593 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-1o 8460 df-2o 8461 df-nadd 8659 df-no 27982 df-lts 27983 df-bday 27984 df-les 28084 df-slts 28126 df-cuts 28128 df-0s 28175 df-made 28195 df-old 28196 df-left 28198 df-right 28199 df-norec2 28317 df-adds 28328 |
| This theorem is used by: addsuniflem 28369 lesubsd 28464 subsge0d 28468 mulsuniflem 28517 n0lesltp1 28734 bdaypw2n0bndlem 28831 bdayfinbndlem1 28835 z12bdaylem1 28838 elreno2 28863 |
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