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| Mirrors > Home > MPE Home > Th. List > efne0d | Structured version Visualization version GIF version | ||
| Description: The exponential of a complex number is nonzero, deduction form. (Contributed by NM, 13-Jan-2006.) (Revised by Mario Carneiro, 29-Apr-2014.) (Revised by SN, 25-Apr-2025.) |
| Ref | Expression |
|---|---|
| efne0d.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| Ref | Expression |
|---|---|
| efne0d | ⊢ (𝜑 → (exp‘𝐴) ≠ 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1ne0 11194 | . 2 ⊢ 1 ≠ 0 | |
| 2 | oveq1 7423 | . . . 4 ⊢ ((exp‘𝐴) = 0 → ((exp‘𝐴) · (exp‘-𝐴)) = (0 · (exp‘-𝐴))) | |
| 3 | efne0d.1 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 4 | efcan 16184 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → ((exp‘𝐴) · (exp‘-𝐴)) = 1) | |
| 5 | 3, 4 | syl 18 | . . . . 5 ⊢ (𝜑 → ((exp‘𝐴) · (exp‘-𝐴)) = 1) |
| 6 | 3 | negcld 11581 | . . . . . . 7 ⊢ (𝜑 → -𝐴 ∈ ℂ) |
| 7 | 6 | efcld 16171 | . . . . . 6 ⊢ (𝜑 → (exp‘-𝐴) ∈ ℂ) |
| 8 | 7 | mul02d 11433 | . . . . 5 ⊢ (𝜑 → (0 · (exp‘-𝐴)) = 0) |
| 9 | 5, 8 | eqeq12d 2778 | . . . 4 ⊢ (𝜑 → (((exp‘𝐴) · (exp‘-𝐴)) = (0 · (exp‘-𝐴)) ↔ 1 = 0)) |
| 10 | 2, 9 | imbitrid 247 | . . 3 ⊢ (𝜑 → ((exp‘𝐴) = 0 → 1 = 0)) |
| 11 | 10 | necon3d 2978 | . 2 ⊢ (𝜑 → (1 ≠ 0 → (exp‘𝐴) ≠ 0)) |
| 12 | 1, 11 | mpi 21 | 1 ⊢ (𝜑 → (exp‘𝐴) ≠ 0) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ≠ wne 2957 ‘cfv 6537 (class class class)co 7416 ℂcc 11123 0cc0 11125 1c1 11126 · cmul 11130 -cneg 11467 expce 16149 |
| 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-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-inf2 9623 ax-cnex 11181 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 ax-pre-sup 11203 |
| 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-int 4911 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-se 5613 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-isom 6546 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8458 df-er 8699 df-pm 8832 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-sup 9415 df-inf 9416 df-oi 9485 df-card 9947 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-3 12329 df-n0 12530 df-z 12617 df-uz 12889 df-rp 13043 df-ico 13404 df-fz 13562 df-fzo 13710 df-fl 13853 df-seq 14066 df-exp 14126 df-fac 14338 df-bc 14367 df-hash 14395 df-shft 15140 df-cj 15186 df-re 15187 df-im 15188 df-sqrt 15322 df-abs 15323 df-limsup 15558 df-clim 15575 df-rlim 15576 df-sum 15774 df-ef 16155 |
| This theorem is used by: efne0 16186 cos9thpiminply 34283 cos9thpinconstrlem2 34285 cos9thpinconstr 34286 ef11d 43199 |
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