| Mathbox for Alexander van der Vekens |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > cndivrenred | Structured version Visualization version GIF version | ||
| Description: The quotient of an imaginary number and a real number is not a real number. (Contributed by AV, 23-Jan-2023.) |
| Ref | Expression |
|---|---|
| recnaddnred.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| recnaddnred.b | ⊢ (𝜑 → 𝐵 ∈ (ℂ ∖ ℝ)) |
| cndivrenred.n | ⊢ (𝜑 → 𝐴 ≠ 0) |
| Ref | Expression |
|---|---|
| cndivrenred | ⊢ (𝜑 → (𝐵 / 𝐴) ∉ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | recnaddnred.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ (ℂ ∖ ℝ)) | |
| 2 | 1 | eldifbd 3915 | . 2 ⊢ (𝜑 → ¬ 𝐵 ∈ ℝ) |
| 3 | df-nel 3064 | . . 3 ⊢ ((𝐵 / 𝐴) ∉ ℝ ↔ ¬ (𝐵 / 𝐴) ∈ ℝ) | |
| 4 | 1 | eldifad 3914 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 5 | recnaddnred.a | . . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 6 | 5 | recnd 11262 | . . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 7 | cndivrenred.n | . . . . . . 7 ⊢ (𝜑 → 𝐴 ≠ 0) | |
| 8 | 4, 6, 7 | divcld 12016 | . . . . . 6 ⊢ (𝜑 → (𝐵 / 𝐴) ∈ ℂ) |
| 9 | reim0b 15206 | . . . . . 6 ⊢ ((𝐵 / 𝐴) ∈ ℂ → ((𝐵 / 𝐴) ∈ ℝ ↔ (ℑ‘(𝐵 / 𝐴)) = 0)) | |
| 10 | 8, 9 | syl 18 | . . . . 5 ⊢ (𝜑 → ((𝐵 / 𝐴) ∈ ℝ ↔ (ℑ‘(𝐵 / 𝐴)) = 0)) |
| 11 | 4 | imcld 15282 | . . . . . . . 8 ⊢ (𝜑 → (ℑ‘𝐵) ∈ ℝ) |
| 12 | 11 | recnd 11262 | . . . . . . 7 ⊢ (𝜑 → (ℑ‘𝐵) ∈ ℂ) |
| 13 | 12, 6, 7 | diveq0ad 12026 | . . . . . 6 ⊢ (𝜑 → (((ℑ‘𝐵) / 𝐴) = 0 ↔ (ℑ‘𝐵) = 0)) |
| 14 | 5, 4, 7 | imdivd 15317 | . . . . . . 7 ⊢ (𝜑 → (ℑ‘(𝐵 / 𝐴)) = ((ℑ‘𝐵) / 𝐴)) |
| 15 | 14 | eqeq1d 2764 | . . . . . 6 ⊢ (𝜑 → ((ℑ‘(𝐵 / 𝐴)) = 0 ↔ ((ℑ‘𝐵) / 𝐴) = 0)) |
| 16 | reim0b 15206 | . . . . . . 7 ⊢ (𝐵 ∈ ℂ → (𝐵 ∈ ℝ ↔ (ℑ‘𝐵) = 0)) | |
| 17 | 4, 16 | syl 18 | . . . . . 6 ⊢ (𝜑 → (𝐵 ∈ ℝ ↔ (ℑ‘𝐵) = 0)) |
| 18 | 13, 15, 17 | 3bitr4d 314 | . . . . 5 ⊢ (𝜑 → ((ℑ‘(𝐵 / 𝐴)) = 0 ↔ 𝐵 ∈ ℝ)) |
| 19 | 10, 18 | bitrd 282 | . . . 4 ⊢ (𝜑 → ((𝐵 / 𝐴) ∈ ℝ ↔ 𝐵 ∈ ℝ)) |
| 20 | 19 | notbid 321 | . . 3 ⊢ (𝜑 → (¬ (𝐵 / 𝐴) ∈ ℝ ↔ ¬ 𝐵 ∈ ℝ)) |
| 21 | 3, 20 | bitrid 286 | . 2 ⊢ (𝜑 → ((𝐵 / 𝐴) ∉ ℝ ↔ ¬ 𝐵 ∈ ℝ)) |
| 22 | 2, 21 | mpbird 260 | 1 ⊢ (𝜑 → (𝐵 / 𝐴) ∉ ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 ≠ wne 2957 ∉ wnel 3063 ∖ cdif 3899 ‘cfv 6537 (class class class)co 7416 ℂcc 11123 ℝcr 11124 0cc0 11125 / cdiv 11896 ℑcim 15185 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-resscn 11182 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-addrcl 11186 ax-mulcl 11187 ax-mulrcl 11188 ax-mulcom 11189 ax-addass 11190 ax-mulass 11191 ax-distr 11192 ax-i2m1 11193 ax-1ne0 11194 ax-1rid 11195 ax-rnegex 11196 ax-rrecex 11197 ax-cnre 11198 ax-pre-lttri 11199 ax-pre-lttrn 11200 ax-pre-ltadd 11201 ax-pre-mulgt0 11202 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 df-sub 11468 df-neg 11469 df-div 11897 df-nn 12259 df-2 12328 df-cj 15186 df-re 15187 df-im 15188 |
| This theorem is used by: requad01 48522 |
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