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| Mirrors > Home > MPE Home > Th. List > xadd4d | Structured version Visualization version GIF version | ||
| Description: Rearrangement of 4 terms in a sum for extended addition, analogous to add4d 11549. (Contributed by Alexander van der Vekens, 21-Dec-2017.) |
| Ref | Expression |
|---|---|
| xadd4d.1 | ⊢ (𝜑 → (𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞)) |
| xadd4d.2 | ⊢ (𝜑 → (𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞)) |
| xadd4d.3 | ⊢ (𝜑 → (𝐶 ∈ ℝ* ∧ 𝐶 ≠ -∞)) |
| xadd4d.4 | ⊢ (𝜑 → (𝐷 ∈ ℝ* ∧ 𝐷 ≠ -∞)) |
| Ref | Expression |
|---|---|
| xadd4d | ⊢ (𝜑 → ((𝐴 +e 𝐵) +e (𝐶 +e 𝐷)) = ((𝐴 +e 𝐶) +e (𝐵 +e 𝐷))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xadd4d.3 | . . . 4 ⊢ (𝜑 → (𝐶 ∈ ℝ* ∧ 𝐶 ≠ -∞)) | |
| 2 | xadd4d.2 | . . . 4 ⊢ (𝜑 → (𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞)) | |
| 3 | xadd4d.4 | . . . 4 ⊢ (𝜑 → (𝐷 ∈ ℝ* ∧ 𝐷 ≠ -∞)) | |
| 4 | xaddass 13389 | . . . 4 ⊢ (((𝐶 ∈ ℝ* ∧ 𝐶 ≠ -∞) ∧ (𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞) ∧ (𝐷 ∈ ℝ* ∧ 𝐷 ≠ -∞)) → ((𝐶 +e 𝐵) +e 𝐷) = (𝐶 +e (𝐵 +e 𝐷))) | |
| 5 | 1, 2, 3, 4 | syl3anc 1398 | . . 3 ⊢ (𝜑 → ((𝐶 +e 𝐵) +e 𝐷) = (𝐶 +e (𝐵 +e 𝐷))) |
| 6 | 5 | oveq2d 7443 | . 2 ⊢ (𝜑 → (𝐴 +e ((𝐶 +e 𝐵) +e 𝐷)) = (𝐴 +e (𝐶 +e (𝐵 +e 𝐷)))) |
| 7 | xadd4d.1 | . . . 4 ⊢ (𝜑 → (𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞)) | |
| 8 | 1 | simpld 500 | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ ℝ*) |
| 9 | 3 | simpld 500 | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ ℝ*) |
| 10 | 8, 9 | xaddcld 13441 | . . . 4 ⊢ (𝜑 → (𝐶 +e 𝐷) ∈ ℝ*) |
| 11 | xaddnemnf 13376 | . . . . 5 ⊢ (((𝐶 ∈ ℝ* ∧ 𝐶 ≠ -∞) ∧ (𝐷 ∈ ℝ* ∧ 𝐷 ≠ -∞)) → (𝐶 +e 𝐷) ≠ -∞) | |
| 12 | 1, 3, 11 | syl2anc 596 | . . . 4 ⊢ (𝜑 → (𝐶 +e 𝐷) ≠ -∞) |
| 13 | xaddass 13389 | . . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞) ∧ (𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞) ∧ ((𝐶 +e 𝐷) ∈ ℝ* ∧ (𝐶 +e 𝐷) ≠ -∞)) → ((𝐴 +e 𝐵) +e (𝐶 +e 𝐷)) = (𝐴 +e (𝐵 +e (𝐶 +e 𝐷)))) | |
| 14 | 7, 2, 10, 12, 13 | syl112anc 1401 | . . 3 ⊢ (𝜑 → ((𝐴 +e 𝐵) +e (𝐶 +e 𝐷)) = (𝐴 +e (𝐵 +e (𝐶 +e 𝐷)))) |
| 15 | 2 | simpld 500 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| 16 | xaddcom 13380 | . . . . . . 7 ⊢ ((𝐶 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 +e 𝐵) = (𝐵 +e 𝐶)) | |
| 17 | 8, 15, 16 | syl2anc 596 | . . . . . 6 ⊢ (𝜑 → (𝐶 +e 𝐵) = (𝐵 +e 𝐶)) |
| 18 | 17 | oveq1d 7442 | . . . . 5 ⊢ (𝜑 → ((𝐶 +e 𝐵) +e 𝐷) = ((𝐵 +e 𝐶) +e 𝐷)) |
| 19 | xaddass 13389 | . . . . . 6 ⊢ (((𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞) ∧ (𝐶 ∈ ℝ* ∧ 𝐶 ≠ -∞) ∧ (𝐷 ∈ ℝ* ∧ 𝐷 ≠ -∞)) → ((𝐵 +e 𝐶) +e 𝐷) = (𝐵 +e (𝐶 +e 𝐷))) | |
| 20 | 2, 1, 3, 19 | syl3anc 1398 | . . . . 5 ⊢ (𝜑 → ((𝐵 +e 𝐶) +e 𝐷) = (𝐵 +e (𝐶 +e 𝐷))) |
| 21 | 18, 20 | eqtr2d 2799 | . . . 4 ⊢ (𝜑 → (𝐵 +e (𝐶 +e 𝐷)) = ((𝐶 +e 𝐵) +e 𝐷)) |
| 22 | 21 | oveq2d 7443 | . . 3 ⊢ (𝜑 → (𝐴 +e (𝐵 +e (𝐶 +e 𝐷))) = (𝐴 +e ((𝐶 +e 𝐵) +e 𝐷))) |
| 23 | 14, 22 | eqtrd 2798 | . 2 ⊢ (𝜑 → ((𝐴 +e 𝐵) +e (𝐶 +e 𝐷)) = (𝐴 +e ((𝐶 +e 𝐵) +e 𝐷))) |
| 24 | 15, 9 | xaddcld 13441 | . . 3 ⊢ (𝜑 → (𝐵 +e 𝐷) ∈ ℝ*) |
| 25 | xaddnemnf 13376 | . . . 4 ⊢ (((𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞) ∧ (𝐷 ∈ ℝ* ∧ 𝐷 ≠ -∞)) → (𝐵 +e 𝐷) ≠ -∞) | |
| 26 | 2, 3, 25 | syl2anc 596 | . . 3 ⊢ (𝜑 → (𝐵 +e 𝐷) ≠ -∞) |
| 27 | xaddass 13389 | . . 3 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞) ∧ (𝐶 ∈ ℝ* ∧ 𝐶 ≠ -∞) ∧ ((𝐵 +e 𝐷) ∈ ℝ* ∧ (𝐵 +e 𝐷) ≠ -∞)) → ((𝐴 +e 𝐶) +e (𝐵 +e 𝐷)) = (𝐴 +e (𝐶 +e (𝐵 +e 𝐷)))) | |
| 28 | 7, 1, 24, 26, 27 | syl112anc 1401 | . 2 ⊢ (𝜑 → ((𝐴 +e 𝐶) +e (𝐵 +e 𝐷)) = (𝐴 +e (𝐶 +e (𝐵 +e 𝐷)))) |
| 29 | 6, 23, 28 | 3eqtr4d 2808 | 1 ⊢ (𝜑 → ((𝐴 +e 𝐵) +e (𝐶 +e 𝐷)) = ((𝐴 +e 𝐶) +e (𝐵 +e 𝐷))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2146 ≠ wne 2958 (class class class)co 7427 -∞cmnf 11351 ℝ*cxr 11352 +e cxad 13249 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5251 ax-nul 5262 ax-pow 5330 ax-pr 5394 ax-un 7758 ax-cnex 11266 ax-resscn 11267 ax-1cn 11268 ax-icn 11269 ax-addcl 11270 ax-addrcl 11271 ax-mulcl 11272 ax-mulrcl 11273 ax-mulcom 11274 ax-addass 11275 ax-mulass 11276 ax-distr 11277 ax-i2m1 11278 ax-1ne0 11279 ax-1rid 11280 ax-rnegex 11281 ax-rrecex 11282 ax-cnre 11283 ax-pre-lttri 11284 ax-pre-lttrn 11285 ax-pre-ltadd 11286 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rab 3416 df-v 3455 df-sbc 3742 df-csb 3851 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-pw 4561 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-iun 4955 df-br 5106 df-opab 5170 df-mpt 5189 df-id 5549 df-po 5562 df-so 5563 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-iota 6500 df-fun 6548 df-fn 6549 df-f 6550 df-f1 6551 df-fo 6552 df-f1o 6553 df-fv 6554 df-ov 7430 df-oprab 7431 df-mpo 7432 df-1st 8008 df-2nd 8009 df-er 8728 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11355 df-mnf 11356 df-xr 11357 df-ltxr 11358 df-xadd 13252 |
| This theorem is used by: xnn0add4d 13444 |
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