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| Mirrors > Home > MPE Home > Th. List > 2sqreulem3 | Structured version Visualization version GIF version | ||
| Description: Lemma 3 for 2sqreu 27438 etc. (Contributed by AV, 25-Jun-2023.) |
| Ref | Expression |
|---|---|
| 2sqreulem3 | ⊢ ((𝐴 ∈ ℕ0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0)) → (((𝜑 ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) ∧ (𝜓 ∧ ((𝐴↑2) + (𝐶↑2)) = 𝑃)) → 𝐵 = 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq2 2751 | . . . . . . . . 9 ⊢ (𝑃 = ((𝐴↑2) + (𝐵↑2)) → (((𝐴↑2) + (𝐶↑2)) = 𝑃 ↔ ((𝐴↑2) + (𝐶↑2)) = ((𝐴↑2) + (𝐵↑2)))) | |
| 2 | 1 | eqcoms 2747 | . . . . . . . 8 ⊢ (((𝐴↑2) + (𝐵↑2)) = 𝑃 → (((𝐴↑2) + (𝐶↑2)) = 𝑃 ↔ ((𝐴↑2) + (𝐶↑2)) = ((𝐴↑2) + (𝐵↑2)))) |
| 3 | 2 | adantl 482 | . . . . . . 7 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) → (((𝐴↑2) + (𝐶↑2)) = 𝑃 ↔ ((𝐴↑2) + (𝐶↑2)) = ((𝐴↑2) + (𝐵↑2)))) |
| 4 | eqcom 2746 | . . . . . . . . 9 ⊢ (((𝐴↑2) + (𝐶↑2)) = ((𝐴↑2) + (𝐵↑2)) ↔ ((𝐴↑2) + (𝐵↑2)) = ((𝐴↑2) + (𝐶↑2))) | |
| 5 | 2sqreulem2 27434 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) → (((𝐴↑2) + (𝐵↑2)) = ((𝐴↑2) + (𝐶↑2)) → 𝐵 = 𝐶)) | |
| 6 | 4, 5 | biimtrid 243 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) → (((𝐴↑2) + (𝐶↑2)) = ((𝐴↑2) + (𝐵↑2)) → 𝐵 = 𝐶)) |
| 7 | 6 | adantr 481 | . . . . . . 7 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) → (((𝐴↑2) + (𝐶↑2)) = ((𝐴↑2) + (𝐵↑2)) → 𝐵 = 𝐶)) |
| 8 | 3, 7 | sylbid 241 | . . . . . 6 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) → (((𝐴↑2) + (𝐶↑2)) = 𝑃 → 𝐵 = 𝐶)) |
| 9 | 8 | adantld 491 | . . . . 5 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) → ((𝜓 ∧ ((𝐴↑2) + (𝐶↑2)) = 𝑃) → 𝐵 = 𝐶)) |
| 10 | 9 | ex 413 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) → (((𝐴↑2) + (𝐵↑2)) = 𝑃 → ((𝜓 ∧ ((𝐴↑2) + (𝐶↑2)) = 𝑃) → 𝐵 = 𝐶))) |
| 11 | 10 | adantld 491 | . . 3 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) → ((𝜑 ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) → ((𝜓 ∧ ((𝐴↑2) + (𝐶↑2)) = 𝑃) → 𝐵 = 𝐶))) |
| 12 | 11 | impd 411 | . 2 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0) → (((𝜑 ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) ∧ (𝜓 ∧ ((𝐴↑2) + (𝐶↑2)) = 𝑃)) → 𝐵 = 𝐶)) |
| 13 | 12 | 3expb 1126 | 1 ⊢ ((𝐴 ∈ ℕ0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ0)) → (((𝜑 ∧ ((𝐴↑2) + (𝐵↑2)) = 𝑃) ∧ (𝜓 ∧ ((𝐴↑2) + (𝐶↑2)) = 𝑃)) → 𝐵 = 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 ∧ w3a 1092 = wceq 1547 ∈ wcel 2119 (class class class)co 7357 + caddc 11033 2c2 12228 ℕ0cn0 12429 ↑cexp 14015 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5219 ax-nul 5229 ax-pow 5295 ax-pr 5363 ax-un 7679 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4263 df-if 4456 df-pw 4532 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-iun 4924 df-br 5074 df-opab 5136 df-mpt 5155 df-tr 5181 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7314 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7808 df-2nd 7933 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-er 8634 df-en 8885 df-dom 8886 df-sdom 8887 df-pnf 11173 df-mnf 11174 df-xr 11175 df-ltxr 11176 df-le 11177 df-sub 11371 df-neg 11372 df-nn 12167 df-2 12236 df-n0 12430 df-z 12517 df-uz 12781 df-seq 13956 df-exp 14016 |
| This theorem is referenced by: 2sqreulem4 27436 |
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