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| Mirrors > Home > MPE Home > Th. List > mulcomnq | Structured version Visualization version GIF version | ||
| Description: Multiplication of positive fractions is commutative. (Contributed by NM, 31-Aug-1995.) (Revised by Mario Carneiro, 28-Apr-2013.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| mulcomnq | ⊢ (𝐴 ·Q 𝐵) = (𝐵 ·Q 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mulcompq 11064 | . . . 4 ⊢ (𝐴 ·pQ 𝐵) = (𝐵 ·pQ 𝐴) | |
| 2 | 1 | fveq2i 6911 | . . 3 ⊢ ([Q]‘(𝐴 ·pQ 𝐵)) = ([Q]‘(𝐵 ·pQ 𝐴)) |
| 3 | mulpqnq 11053 | . . 3 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 ·Q 𝐵) = ([Q]‘(𝐴 ·pQ 𝐵))) | |
| 4 | mulpqnq 11053 | . . . 4 ⊢ ((𝐵 ∈ Q ∧ 𝐴 ∈ Q) → (𝐵 ·Q 𝐴) = ([Q]‘(𝐵 ·pQ 𝐴))) | |
| 5 | 4 | ancoms 464 | . . 3 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐵 ·Q 𝐴) = ([Q]‘(𝐵 ·pQ 𝐴))) |
| 6 | 2, 3, 5 | 3eqtr4a 2824 | . 2 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 ·Q 𝐵) = (𝐵 ·Q 𝐴)) |
| 7 | mulnqf 11061 | . . . 4 ⊢ ·Q :(Q × Q)⟶Q | |
| 8 | 7 | fdmi 6743 | . . 3 ⊢ dom ·Q = (Q × Q) |
| 9 | 8 | ndmovcom 7632 | . 2 ⊢ (¬ (𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 ·Q 𝐵) = (𝐵 ·Q 𝐴)) |
| 10 | 6, 9 | pm2.61i 184 | 1 ⊢ (𝐴 ·Q 𝐵) = (𝐵 ·Q 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2147 × cxp 5653 ‘cfv 6558 (class class class)co 7443 ·pQ cmpq 10961 Qcnq 10964 [Q]cerq 10966 ·Q cmq 10968 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pr 5395 ax-un 7775 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6322 df-ord 6383 df-on 6384 df-lim 6385 df-suc 6386 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-fv 6566 df-ov 7446 df-oprab 7447 df-mpo 7448 df-om 7902 df-1st 8025 df-2nd 8026 df-frecs 8327 df-wrecs 8358 df-recs 8407 df-rdg 8446 df-1o 8504 df-oadd 8508 df-omul 8509 df-er 8745 df-ni 10984 df-mi 10986 df-lti 10987 df-mpq 11021 df-enq 11023 df-nq 11024 df-erq 11025 df-mq 11027 df-1nq 11028 |
| This theorem is used by: recmulnq 11076 recrecnq 11079 halfnq 11088 ltrnq 11091 addclprlem1 11128 addclprlem2 11129 mulclprlem 11131 mulclpr 11132 mulcompr 11135 distrlem4pr 11138 1idpr 11141 prlem934 11145 prlem936 11159 reclem3pr 11161 reclem4pr 11162 |
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