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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fltbccoprm | Structured version Visualization version GIF version | ||
| Description: A counterexample to FLT with 𝐴, 𝐵 coprime also has 𝐵, 𝐶 coprime. Proven from fltaccoprm 43405 using commutativity of addition. (Contributed by SN, 20-Aug-2024.) |
| Ref | Expression |
|---|---|
| fltabcoprmex.a | ⊢ (𝜑 → 𝐴 ∈ ℕ) |
| fltabcoprmex.b | ⊢ (𝜑 → 𝐵 ∈ ℕ) |
| fltabcoprmex.c | ⊢ (𝜑 → 𝐶 ∈ ℕ) |
| fltabcoprmex.n | ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| fltabcoprmex.1 | ⊢ (𝜑 → ((𝐴↑𝑁) + (𝐵↑𝑁)) = (𝐶↑𝑁)) |
| fltaccoprm.1 | ⊢ (𝜑 → (𝐴 gcd 𝐵) = 1) |
| Ref | Expression |
|---|---|
| fltbccoprm | ⊢ (𝜑 → (𝐵 gcd 𝐶) = 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fltabcoprmex.b | . 2 ⊢ (𝜑 → 𝐵 ∈ ℕ) | |
| 2 | fltabcoprmex.a | . 2 ⊢ (𝜑 → 𝐴 ∈ ℕ) | |
| 3 | fltabcoprmex.c | . 2 ⊢ (𝜑 → 𝐶 ∈ ℕ) | |
| 4 | fltabcoprmex.n | . 2 ⊢ (𝜑 → 𝑁 ∈ ℕ0) | |
| 5 | 1, 4 | nnexpcld 14301 | . . . . 5 ⊢ (𝜑 → (𝐵↑𝑁) ∈ ℕ) |
| 6 | 5 | nncnd 12267 | . . . 4 ⊢ (𝜑 → (𝐵↑𝑁) ∈ ℂ) |
| 7 | 2, 4 | nnexpcld 14301 | . . . . 5 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℕ) |
| 8 | 7 | nncnd 12267 | . . . 4 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℂ) |
| 9 | 6, 8 | addcomd 11430 | . . 3 ⊢ (𝜑 → ((𝐵↑𝑁) + (𝐴↑𝑁)) = ((𝐴↑𝑁) + (𝐵↑𝑁))) |
| 10 | fltabcoprmex.1 | . . 3 ⊢ (𝜑 → ((𝐴↑𝑁) + (𝐵↑𝑁)) = (𝐶↑𝑁)) | |
| 11 | 9, 10 | eqtrd 2801 | . 2 ⊢ (𝜑 → ((𝐵↑𝑁) + (𝐴↑𝑁)) = (𝐶↑𝑁)) |
| 12 | 1 | nnzd 12635 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℤ) |
| 13 | 2 | nnzd 12635 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℤ) |
| 14 | 12, 13 | gcdcomd 16597 | . . 3 ⊢ (𝜑 → (𝐵 gcd 𝐴) = (𝐴 gcd 𝐵)) |
| 15 | fltaccoprm.1 | . . 3 ⊢ (𝜑 → (𝐴 gcd 𝐵) = 1) | |
| 16 | 14, 15 | eqtrd 2801 | . 2 ⊢ (𝜑 → (𝐵 gcd 𝐴) = 1) |
| 17 | 1, 2, 3, 4, 11, 16 | fltaccoprm 43405 | 1 ⊢ (𝜑 → (𝐵 gcd 𝐶) = 1) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 (class class class)co 7423 1c1 11119 + caddc 11121 ℕcn 12251 ℕ0cn0 12522 ↑cexp 14117 gcd cgcd 16577 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 ax-pre-sup 11196 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-sup 9412 df-inf 9413 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-div 11890 df-nn 12252 df-2 12321 df-3 12322 df-n0 12523 df-z 12610 df-uz 12881 df-rp 13035 df-fl 13845 df-mod 13923 df-seq 14058 df-exp 14118 df-cj 15176 df-re 15177 df-im 15178 df-sqrt 15312 df-abs 15313 df-dvds 16336 df-gcd 16578 |
| This theorem is used by: flt4lem3 43413 |
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