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| Mirrors > Home > MPE Home > Th. List > divcan2 | Structured version Visualization version GIF version | ||
| Description: A cancellation law for division. (Contributed by NM, 3-Feb-2004.) (Revised by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| divcan2 | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐵 · (𝐴 / 𝐵)) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2729 | . 2 ⊢ (𝐴 / 𝐵) = (𝐴 / 𝐵) | |
| 2 | simp1 1136 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → 𝐴 ∈ ℂ) | |
| 3 | divcl 11843 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐴 / 𝐵) ∈ ℂ) | |
| 4 | 3simpc 1150 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) | |
| 5 | divmul 11840 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (𝐴 / 𝐵) ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) → ((𝐴 / 𝐵) = (𝐴 / 𝐵) ↔ (𝐵 · (𝐴 / 𝐵)) = 𝐴)) | |
| 6 | 2, 3, 4, 5 | syl3anc 1373 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → ((𝐴 / 𝐵) = (𝐴 / 𝐵) ↔ (𝐵 · (𝐴 / 𝐵)) = 𝐴)) |
| 7 | 1, 6 | mpbii 233 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐵 · (𝐴 / 𝐵)) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 (class class class)co 7387 ℂcc 11066 0cc0 11068 · cmul 11073 / cdiv 11835 |
| 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-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 |
| 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-nel 3030 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-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-po 5546 df-so 5547 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-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-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-div 11836 |
| This theorem is referenced by: divcan1 11846 recid 11851 div11OLD 11866 divmuldiv 11882 dmdcan 11892 divcan2zi 11919 divcan2d 11960 zdiv 12604 modlt 13842 addcj 15114 01sqrexlem7 15214 bpoly2 16023 bpoly3 16024 efgt0 16071 sin02gt0 16160 pythagtriplem16 16801 sinq12gt0 26416 coseq1 26434 efeq1 26437 basellem3 26993 chtub 27123 4ipval2 30637 rexdiv 32846 sin2h 37604 cos2h 37605 mblfinlem3 37653 itg2addnclem3 37667 ftc1anclem6 37692 3rdpwhole 42280 dfodd6 47638 nn0enn0exALTV 47701 nnennexALTV 47702 nn0enn0ex 48513 nnennex 48514 blennn0em1 48580 |
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