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| Mirrors > Home > MPE Home > Th. List > mulsne0bd | Structured version Visualization version GIF version | ||
| Description: The product of two non-zero surreals is non-zero. (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 28088 | . . 3 ⊢ (𝜑 → ((𝐴 ·s 𝐵) = 0s ↔ (𝐴 = 0s ∨ 𝐵 = 0s ))) |
| 4 | 3 | necon3abid 2961 | . 2 ⊢ (𝜑 → ((𝐴 ·s 𝐵) ≠ 0s ↔ ¬ (𝐴 = 0s ∨ 𝐵 = 0s ))) |
| 5 | neanior 3018 | . 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 847 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 (class class class)co 7387 No csur 27551 0s c0s 27734 ·s cmuls 28009 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3354 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-ot 4598 df-uni 4872 df-int 4911 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-se 5592 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-1o 8434 df-2o 8435 df-nadd 8630 df-no 27554 df-slt 27555 df-bday 27556 df-sle 27657 df-sslt 27693 df-scut 27695 df-0s 27736 df-made 27755 df-old 27756 df-left 27758 df-right 27759 df-norec 27845 df-norec2 27856 df-adds 27867 df-negs 27927 df-subs 27928 df-muls 28010 |
| This theorem is referenced by: recsne0 28095 divmuldivsd 28134 divdivs1d 28135 |
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