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Mirrors > Home > MPE Home > Th. List > mulne0i | Structured version Visualization version GIF version |
Description: The product of two nonzero numbers is nonzero. (Contributed by NM, 15-Feb-1995.) |
Ref | Expression |
---|---|
muln0.1 | ⊢ 𝐴 ∈ ℂ |
muln0.2 | ⊢ 𝐵 ∈ ℂ |
muln0.3 | ⊢ 𝐴 ≠ 0 |
muln0.4 | ⊢ 𝐵 ≠ 0 |
Ref | Expression |
---|---|
mulne0i | ⊢ (𝐴 · 𝐵) ≠ 0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | muln0.1 | . 2 ⊢ 𝐴 ∈ ℂ | |
2 | muln0.3 | . 2 ⊢ 𝐴 ≠ 0 | |
3 | muln0.2 | . 2 ⊢ 𝐵 ∈ ℂ | |
4 | muln0.4 | . 2 ⊢ 𝐵 ≠ 0 | |
5 | mulne0 11504 | . 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) → (𝐴 · 𝐵) ≠ 0) | |
6 | 1, 2, 3, 4, 5 | mp4an 693 | 1 ⊢ (𝐴 · 𝐵) ≠ 0 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2112 ≠ wne 2943 (class class class)co 7235 ℂcc 10757 0cc0 10759 · cmul 10764 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2710 ax-sep 5209 ax-nul 5216 ax-pow 5275 ax-pr 5339 ax-un 7545 ax-resscn 10816 ax-1cn 10817 ax-icn 10818 ax-addcl 10819 ax-addrcl 10820 ax-mulcl 10821 ax-mulrcl 10822 ax-mulcom 10823 ax-addass 10824 ax-mulass 10825 ax-distr 10826 ax-i2m1 10827 ax-1ne0 10828 ax-1rid 10829 ax-rnegex 10830 ax-rrecex 10831 ax-cnre 10832 ax-pre-lttri 10833 ax-pre-lttrn 10834 ax-pre-ltadd 10835 ax-pre-mulgt0 10836 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2818 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3071 df-rab 3073 df-v 3425 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4255 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-mpt 5153 df-id 5472 df-po 5486 df-so 5487 df-xp 5575 df-rel 5576 df-cnv 5577 df-co 5578 df-dm 5579 df-rn 5580 df-res 5581 df-ima 5582 df-iota 6359 df-fun 6403 df-fn 6404 df-f 6405 df-f1 6406 df-fo 6407 df-f1o 6408 df-fv 6409 df-riota 7192 df-ov 7238 df-oprab 7239 df-mpo 7240 df-er 8415 df-en 8651 df-dom 8652 df-sdom 8653 df-pnf 10899 df-mnf 10900 df-xr 10901 df-ltxr 10902 df-le 10903 df-sub 11094 df-neg 11095 |
This theorem is referenced by: 2muline0 12084 bpoly4 15654 efeq1 25449 eflogeq 25522 root1eq1 25673 ang180lem1 25724 ang180lem3 25726 quart1lem 25770 itgexpif 32330 hgt750lem 32375 quad3 33372 proot1ex 40777 wallispilem4 43330 dirkertrigeq 43363 |
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