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| Mirrors > Home > MPE Home > Th. List > adds12d | Structured version Visualization version GIF version | ||
| Description: Commutative/associative law that swaps the first two terms in a triple sum. (Contributed by Scott Fenton, 9-Mar-2025.) |
| Ref | Expression |
|---|---|
| addsassd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| addsassd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| addsassd.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| Ref | Expression |
|---|---|
| adds12d | ⊢ (𝜑 → (𝐴 +s (𝐵 +s 𝐶)) = (𝐵 +s (𝐴 +s 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | addsassd.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | addsassd.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | 1, 2 | addscomd 28122 | . . 3 ⊢ (𝜑 → (𝐴 +s 𝐵) = (𝐵 +s 𝐴)) |
| 4 | 3 | oveq1d 7423 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) +s 𝐶) = ((𝐵 +s 𝐴) +s 𝐶)) |
| 5 | addsassd.3 | . . 3 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 6 | 1, 2, 5 | addsassd 28161 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) +s 𝐶) = (𝐴 +s (𝐵 +s 𝐶))) |
| 7 | 2, 1, 5 | addsassd 28161 | . 2 ⊢ (𝜑 → ((𝐵 +s 𝐴) +s 𝐶) = (𝐵 +s (𝐴 +s 𝐶))) |
| 8 | 4, 6, 7 | 3eqtr3d 2812 | 1 ⊢ (𝜑 → (𝐴 +s (𝐵 +s 𝐶)) = (𝐵 +s (𝐴 +s 𝐶))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 (class class class)co 7408 No csur 27766 +s cadds 28114 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5239 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-tp 4596 df-op 4598 df-ot 4600 df-uni 4874 df-int 4914 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-se 5613 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6299 df-ord 6360 df-on 6361 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-1o 8449 df-2o 8450 df-nadd 8648 df-no 27769 df-lts 27770 df-bday 27771 df-les 27871 df-slts 27913 df-cuts 27915 df-0s 27962 df-made 27982 df-old 27983 df-left 27985 df-right 27986 df-norec2 28104 df-adds 28115 |
| This theorem is referenced by: addsdilem4 28309 |
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