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| Mirrors > Home > MPE Home > Th. List > addsqrexnreu | Structured version Visualization version GIF version | ||
| Description: For each complex number,
there exists a complex number to which the
square of more than one (or no) other complex numbers can be added to
result in the given complex number.
Remark: This theorem, together with addsq2reu 27332, shows that there are cases in which there is a set together with a not unique other set fulfilling a wff, although there is a unique set fulfilling the wff together with another unique set (see addsq2reu 27332). For more details see comment for addsqnreup 27335. (Contributed by AV, 20-Jun-2023.) |
| Ref | Expression |
|---|---|
| addsqrexnreu | ⊢ (𝐶 ∈ ℂ → ∃𝑎 ∈ ℂ ¬ ∃!𝑏 ∈ ℂ (𝑎 + (𝑏↑2)) = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | peano2cnm 11418 | . 2 ⊢ (𝐶 ∈ ℂ → (𝐶 − 1) ∈ ℂ) | |
| 2 | oveq1 7347 | . . . . . 6 ⊢ (𝑎 = (𝐶 − 1) → (𝑎 + (𝑏↑2)) = ((𝐶 − 1) + (𝑏↑2))) | |
| 3 | 2 | eqeq1d 2731 | . . . . 5 ⊢ (𝑎 = (𝐶 − 1) → ((𝑎 + (𝑏↑2)) = 𝐶 ↔ ((𝐶 − 1) + (𝑏↑2)) = 𝐶)) |
| 4 | 3 | reubidv 3359 | . . . 4 ⊢ (𝑎 = (𝐶 − 1) → (∃!𝑏 ∈ ℂ (𝑎 + (𝑏↑2)) = 𝐶 ↔ ∃!𝑏 ∈ ℂ ((𝐶 − 1) + (𝑏↑2)) = 𝐶)) |
| 5 | 4 | notbid 318 | . . 3 ⊢ (𝑎 = (𝐶 − 1) → (¬ ∃!𝑏 ∈ ℂ (𝑎 + (𝑏↑2)) = 𝐶 ↔ ¬ ∃!𝑏 ∈ ℂ ((𝐶 − 1) + (𝑏↑2)) = 𝐶)) |
| 6 | 5 | adantl 481 | . 2 ⊢ ((𝐶 ∈ ℂ ∧ 𝑎 = (𝐶 − 1)) → (¬ ∃!𝑏 ∈ ℂ (𝑎 + (𝑏↑2)) = 𝐶 ↔ ¬ ∃!𝑏 ∈ ℂ ((𝐶 − 1) + (𝑏↑2)) = 𝐶)) |
| 7 | ax-1cn 11055 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 8 | neg1cn 12101 | . . . . 5 ⊢ -1 ∈ ℂ | |
| 9 | 1nn 12127 | . . . . . 6 ⊢ 1 ∈ ℕ | |
| 10 | nnneneg 12151 | . . . . . 6 ⊢ (1 ∈ ℕ → 1 ≠ -1) | |
| 11 | 9, 10 | ax-mp 5 | . . . . 5 ⊢ 1 ≠ -1 |
| 12 | 7, 8, 11 | 3pm3.2i 1340 | . . . 4 ⊢ (1 ∈ ℂ ∧ -1 ∈ ℂ ∧ 1 ≠ -1) |
| 13 | sq1 14090 | . . . . . 6 ⊢ (1↑2) = 1 | |
| 14 | 13 | eqcomi 2738 | . . . . 5 ⊢ 1 = (1↑2) |
| 15 | neg1sqe1 14091 | . . . . . 6 ⊢ (-1↑2) = 1 | |
| 16 | 15 | eqcomi 2738 | . . . . 5 ⊢ 1 = (-1↑2) |
| 17 | 14, 16 | pm3.2i 470 | . . . 4 ⊢ (1 = (1↑2) ∧ 1 = (-1↑2)) |
| 18 | oveq1 7347 | . . . . . 6 ⊢ (𝑏 = 1 → (𝑏↑2) = (1↑2)) | |
| 19 | 18 | eqeq2d 2740 | . . . . 5 ⊢ (𝑏 = 1 → (1 = (𝑏↑2) ↔ 1 = (1↑2))) |
| 20 | oveq1 7347 | . . . . . 6 ⊢ (𝑏 = -1 → (𝑏↑2) = (-1↑2)) | |
| 21 | 20 | eqeq2d 2740 | . . . . 5 ⊢ (𝑏 = -1 → (1 = (𝑏↑2) ↔ 1 = (-1↑2))) |
| 22 | 19, 21 | 2nreu 4391 | . . . 4 ⊢ ((1 ∈ ℂ ∧ -1 ∈ ℂ ∧ 1 ≠ -1) → ((1 = (1↑2) ∧ 1 = (-1↑2)) → ¬ ∃!𝑏 ∈ ℂ 1 = (𝑏↑2))) |
| 23 | 12, 17, 22 | mp2 9 | . . 3 ⊢ ¬ ∃!𝑏 ∈ ℂ 1 = (𝑏↑2) |
| 24 | simpl 482 | . . . . . 6 ⊢ ((𝐶 ∈ ℂ ∧ 𝑏 ∈ ℂ) → 𝐶 ∈ ℂ) | |
| 25 | 1 | adantr 480 | . . . . . 6 ⊢ ((𝐶 ∈ ℂ ∧ 𝑏 ∈ ℂ) → (𝐶 − 1) ∈ ℂ) |
| 26 | sqcl 14013 | . . . . . . 7 ⊢ (𝑏 ∈ ℂ → (𝑏↑2) ∈ ℂ) | |
| 27 | 26 | adantl 481 | . . . . . 6 ⊢ ((𝐶 ∈ ℂ ∧ 𝑏 ∈ ℂ) → (𝑏↑2) ∈ ℂ) |
| 28 | 24, 25, 27 | subaddd 11481 | . . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ 𝑏 ∈ ℂ) → ((𝐶 − (𝐶 − 1)) = (𝑏↑2) ↔ ((𝐶 − 1) + (𝑏↑2)) = 𝐶)) |
| 29 | id 22 | . . . . . . . 8 ⊢ (𝐶 ∈ ℂ → 𝐶 ∈ ℂ) | |
| 30 | 1cnd 11098 | . . . . . . . 8 ⊢ (𝐶 ∈ ℂ → 1 ∈ ℂ) | |
| 31 | 29, 30 | nncand 11468 | . . . . . . 7 ⊢ (𝐶 ∈ ℂ → (𝐶 − (𝐶 − 1)) = 1) |
| 32 | 31 | adantr 480 | . . . . . 6 ⊢ ((𝐶 ∈ ℂ ∧ 𝑏 ∈ ℂ) → (𝐶 − (𝐶 − 1)) = 1) |
| 33 | 32 | eqeq1d 2731 | . . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ 𝑏 ∈ ℂ) → ((𝐶 − (𝐶 − 1)) = (𝑏↑2) ↔ 1 = (𝑏↑2))) |
| 34 | 28, 33 | bitr3d 281 | . . . 4 ⊢ ((𝐶 ∈ ℂ ∧ 𝑏 ∈ ℂ) → (((𝐶 − 1) + (𝑏↑2)) = 𝐶 ↔ 1 = (𝑏↑2))) |
| 35 | 34 | reubidva 3357 | . . 3 ⊢ (𝐶 ∈ ℂ → (∃!𝑏 ∈ ℂ ((𝐶 − 1) + (𝑏↑2)) = 𝐶 ↔ ∃!𝑏 ∈ ℂ 1 = (𝑏↑2))) |
| 36 | 23, 35 | mtbiri 327 | . 2 ⊢ (𝐶 ∈ ℂ → ¬ ∃!𝑏 ∈ ℂ ((𝐶 − 1) + (𝑏↑2)) = 𝐶) |
| 37 | 1, 6, 36 | rspcedvd 3576 | 1 ⊢ (𝐶 ∈ ℂ → ∃𝑎 ∈ ℂ ¬ ∃!𝑏 ∈ ℂ (𝑎 + (𝑏↑2)) = 𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 ∃wrex 3053 ∃!wreu 3341 (class class class)co 7340 ℂcc 10995 1c1 10998 + caddc 11000 − cmin 11335 -cneg 11336 ℕcn 12116 2c2 12171 ↑cexp 13956 |
| 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 5231 ax-nul 5241 ax-pow 5300 ax-pr 5367 ax-un 7662 ax-cnex 11053 ax-resscn 11054 ax-1cn 11055 ax-icn 11056 ax-addcl 11057 ax-addrcl 11058 ax-mulcl 11059 ax-mulrcl 11060 ax-mulcom 11061 ax-addass 11062 ax-mulass 11063 ax-distr 11064 ax-i2m1 11065 ax-1ne0 11066 ax-1rid 11067 ax-rnegex 11068 ax-rrecex 11069 ax-cnre 11070 ax-pre-lttri 11071 ax-pre-lttrn 11072 ax-pre-ltadd 11073 ax-pre-mulgt0 11074 |
| 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 3343 df-reu 3344 df-rab 3393 df-v 3435 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-iun 4940 df-br 5089 df-opab 5151 df-mpt 5170 df-tr 5196 df-id 5508 df-eprel 5513 df-po 5521 df-so 5522 df-fr 5566 df-we 5568 df-xp 5619 df-rel 5620 df-cnv 5621 df-co 5622 df-dm 5623 df-rn 5624 df-res 5625 df-ima 5626 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-riota 7297 df-ov 7343 df-oprab 7344 df-mpo 7345 df-om 7791 df-2nd 7916 df-frecs 8205 df-wrecs 8236 df-recs 8285 df-rdg 8323 df-er 8616 df-en 8864 df-dom 8865 df-sdom 8866 df-pnf 11139 df-mnf 11140 df-xr 11141 df-ltxr 11142 df-le 11143 df-sub 11337 df-neg 11338 df-div 11766 df-nn 12117 df-2 12179 df-n0 12373 df-z 12460 df-uz 12724 df-seq 13897 df-exp 13957 |
| This theorem is referenced by: (None) |
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