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| Mirrors > Home > MPE Home > Th. List > ltmulsd | Structured version Visualization version GIF version | ||
| Description: An ordering relationship for surreal multiplication. Compare theorem 8(iii) of [Conway] p. 19. (Contributed by Scott Fenton, 6-Mar-2025.) |
| Ref | Expression |
|---|---|
| ltmulsd.1 | ⊢ (𝜑 → 𝐴 ∈ No) |
| ltmulsd.2 | ⊢ (𝜑 → 𝐵 ∈ No) |
| ltmulsd.3 | ⊢ (𝜑 → 𝐶 ∈ No) |
| ltmulsd.4 | ⊢ (𝜑 → 𝐷 ∈ No) |
| ltmulsd.5 | ⊢ (𝜑 → 𝐴 <s 𝐵) |
| ltmulsd.6 | ⊢ (𝜑 → 𝐶 <s 𝐷) |
| Ref | Expression |
|---|---|
| ltmulsd | ⊢ (𝜑 → ((𝐴 ·s 𝐷) −s (𝐴 ·s 𝐶)) <s ((𝐵 ·s 𝐷) −s (𝐵 ·s 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltmulsd.5 | . 2 ⊢ (𝜑 → 𝐴 <s 𝐵) | |
| 2 | ltmulsd.6 | . 2 ⊢ (𝜑 → 𝐶 <s 𝐷) | |
| 3 | ltmulsd.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ No) | |
| 4 | ltmulsd.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ No) | |
| 5 | ltmulsd.3 | . . 3 ⊢ (𝜑 → 𝐶 ∈ No) | |
| 6 | ltmulsd.4 | . . 3 ⊢ (𝜑 → 𝐷 ∈ No) | |
| 7 | ltmuls 28531 | . . 3 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No) ∧ (𝐶 ∈ No ∧ 𝐷 ∈ No)) → ((𝐴 <s 𝐵 ∧ 𝐶 <s 𝐷) → ((𝐴 ·s 𝐷) −s (𝐴 ·s 𝐶)) <s ((𝐵 ·s 𝐷) −s (𝐵 ·s 𝐶)))) | |
| 8 | 3, 4, 5, 6, 7 | syl22anc 852 | . 2 ⊢ (𝜑 → ((𝐴 <s 𝐵 ∧ 𝐶 <s 𝐷) → ((𝐴 ·s 𝐷) −s (𝐴 ·s 𝐶)) <s ((𝐵 ·s 𝐷) −s (𝐵 ·s 𝐶)))) |
| 9 | 1, 2, 8 | mp2and 712 | 1 ⊢ (𝜑 → ((𝐴 ·s 𝐷) −s (𝐴 ·s 𝐶)) <s ((𝐵 ·s 𝐷) −s (𝐵 ·s 𝐶))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2144 class class class wbr 5102 (class class class)co 7424 Nocsur 28006 <s clts 28007 −s csubs 28415 ·s cmuls 28501 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-ot 4858 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 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 6307 df-ord 6368 df-on 6369 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7381 df-ov 7427 df-oprab 7428 df-mpo 7429 df-1st 8005 df-2nd 8006 df-frecs 8307 df-wrecs 8338 df-recs 8387 df-1o 8484 df-2o 8485 df-nadd 8683 df-no 28009 df-lts 28010 df-bday 28011 df-les 28111 df-slts 28153 df-cuts 28155 df-0s 28202 df-made 28222 df-old 28223 df-left 28225 df-right 28226 df-norec 28333 df-norec2 28344 df-adds 28355 df-negs 28416 df-subs 28417 df-muls 28502 |
| This theorem is used by: lemulsd 28533 mulsgt0 28539 sltmuls1 28542 sltmuls2 28543 |
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