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| Mirrors > Home > ILE Home > Th. List > crap0 | GIF version | ||
| Description: The real representation of complex numbers is apart from zero iff one of its terms is apart from zero. (Contributed by Jim Kingdon, 5-Mar-2020.) |
| Ref | Expression |
|---|---|
| crap0 | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 # 0 ∨ 𝐵 # 0) ↔ (𝐴 + (i · 𝐵)) # 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 8332 | . . 3 ⊢ 0 ∈ ℝ | |
| 2 | apreim 8939 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (0 ∈ ℝ ∧ 0 ∈ ℝ)) → ((𝐴 + (i · 𝐵)) # (0 + (i · 0)) ↔ (𝐴 # 0 ∨ 𝐵 # 0))) | |
| 3 | 1, 1, 2 | mpanr12 443 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 + (i · 𝐵)) # (0 + (i · 0)) ↔ (𝐴 # 0 ∨ 𝐵 # 0))) |
| 4 | ax-icn 8280 | . . . . . 6 ⊢ i ∈ ℂ | |
| 5 | 4 | mul01i 8725 | . . . . 5 ⊢ (i · 0) = 0 |
| 6 | 5 | oveq2i 6099 | . . . 4 ⊢ (0 + (i · 0)) = (0 + 0) |
| 7 | 00id 8474 | . . . 4 ⊢ (0 + 0) = 0 | |
| 8 | 6, 7 | eqtri 2259 | . . 3 ⊢ (0 + (i · 0)) = 0 |
| 9 | 8 | breq2i 4139 | . 2 ⊢ ((𝐴 + (i · 𝐵)) # (0 + (i · 0)) ↔ (𝐴 + (i · 𝐵)) # 0) |
| 10 | 3, 9 | bitr3di 195 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 # 0 ∨ 𝐵 # 0) ↔ (𝐴 + (i · 𝐵)) # 0)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 ∨ wo 720 ∈ wcel 2209 class class class wbr 4131 (class class class)co 6088 ℝcr 8184 0cc0 8185 ici 8187 + caddc 8188 · cmul 8190 # cap 8917 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-mulrcl 8284 ax-addcom 8285 ax-mulcom 8286 ax-addass 8287 ax-mulass 8288 ax-distr 8289 ax-i2m1 8290 ax-0lt1 8291 ax-1rid 8292 ax-0id 8293 ax-rnegex 8294 ax-precex 8295 ax-cnre 8296 ax-pre-ltirr 8297 ax-pre-lttrn 8299 ax-pre-apti 8300 ax-pre-ltadd 8301 ax-pre-mulgt0 8302 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4132 df-opab 4194 df-id 4440 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-iota 5340 df-fun 5382 df-fv 5388 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-pnf 8368 df-mnf 8369 df-ltxr 8371 df-sub 8506 df-neg 8507 df-reap 8911 df-ap 8918 |
| This theorem is used by: abs00ap 11850 |
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