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| Mirrors > Home > ILE Home > Th. List > grpassd | GIF version | ||
| Description: A group operation is associative. (Contributed by SN, 29-Jan-2025.) |
| Ref | Expression |
|---|---|
| grpassd.b | ⊢ 𝐵 = (Base‘𝐺) |
| grpassd.p | ⊢ + = (+g‘𝐺) |
| grpassd.g | ⊢ (𝜑 → 𝐺 ∈ Grp) |
| grpassd.1 | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| grpassd.2 | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| grpassd.3 | ⊢ (𝜑 → 𝑍 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| grpassd | ⊢ (𝜑 → ((𝑋 + 𝑌) + 𝑍) = (𝑋 + (𝑌 + 𝑍))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | grpassd.g | . 2 ⊢ (𝜑 → 𝐺 ∈ Grp) | |
| 2 | grpassd.1 | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 3 | grpassd.2 | . 2 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 4 | grpassd.3 | . 2 ⊢ (𝜑 → 𝑍 ∈ 𝐵) | |
| 5 | grpassd.b | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 6 | grpassd.p | . . 3 ⊢ + = (+g‘𝐺) | |
| 7 | 5, 6 | grpass 13711 | . 2 ⊢ ((𝐺 ∈ Grp ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 + 𝑌) + 𝑍) = (𝑋 + (𝑌 + 𝑍))) |
| 8 | 1, 2, 3, 4, 7 | syl13anc 1276 | 1 ⊢ (𝜑 → ((𝑋 + 𝑌) + 𝑍) = (𝑋 + (𝑌 + 𝑍))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2203 ‘cfv 5351 (class class class)co 6049 Basecbs 13201 +gcplusg 13279 Grpcgrp 13702 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-cnex 8214 ax-resscn 8215 ax-1re 8217 ax-addrcl 8220 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2814 df-sbc 3042 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-iota 5311 df-fun 5353 df-fn 5354 df-fv 5359 df-ov 6052 df-inn 9234 df-2 9292 df-ndx 13204 df-slot 13205 df-base 13207 df-plusg 13292 df-sgrp 13604 df-mnd 13619 df-grp 13705 |
| This theorem is referenced by: (None) |
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