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| Mirrors > Home > MPE Home > Th. List > mulsne0bd | Structured version Visualization version GIF version | ||
| Description: The product of two nonzero surreals is nonzero. (Contributed by Scott Fenton, 16-Apr-2025.) |
| Ref | Expression |
|---|---|
| muls0ord.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| muls0ord.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| Ref | Expression |
|---|---|
| mulsne0bd | ⊢ (𝜑 → ((𝐴 ·s 𝐵) ≠ 0s ↔ (𝐴 ≠ 0s ∧ 𝐵 ≠ 0s ))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | muls0ord.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | muls0ord.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | 1, 2 | muls0ord 28177 | . . 3 ⊢ (𝜑 → ((𝐴 ·s 𝐵) = 0s ↔ (𝐴 = 0s ∨ 𝐵 = 0s ))) |
| 4 | 3 | necon3abid 2969 | . 2 ⊢ (𝜑 → ((𝐴 ·s 𝐵) ≠ 0s ↔ ¬ (𝐴 = 0s ∨ 𝐵 = 0s ))) |
| 5 | neanior 3026 | . 2 ⊢ ((𝐴 ≠ 0s ∧ 𝐵 ≠ 0s ) ↔ ¬ (𝐴 = 0s ∨ 𝐵 = 0s )) | |
| 6 | 4, 5 | bitr4di 289 | 1 ⊢ (𝜑 → ((𝐴 ·s 𝐵) ≠ 0s ↔ (𝐴 ≠ 0s ∧ 𝐵 ≠ 0s ))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 848 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7367 No csur 27603 0s c0s 27797 ·s cmuls 28098 |
| 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 5213 ax-sep 5232 ax-nul 5242 ax-pow 5308 ax-pr 5376 ax-un 7689 |
| 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 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-ot 4577 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6266 df-ord 6327 df-on 6328 df-suc 6330 df-iota 6455 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-1o 8405 df-2o 8406 df-nadd 8602 df-no 27606 df-lts 27607 df-bday 27608 df-les 27709 df-slts 27750 df-cuts 27752 df-0s 27799 df-made 27819 df-old 27820 df-left 27822 df-right 27823 df-norec 27930 df-norec2 27941 df-adds 27952 df-negs 28013 df-subs 28014 df-muls 28099 |
| This theorem is referenced by: recsne0 28184 divmuldivsd 28224 divdivs1d 28225 |
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