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Related theorems GIF version |
| Description: Domain of equivalence relation for positive fractions. |
| Ref | Expression |
|---|---|
| dmenq | ⊢ dom ~Q = (N × N) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-enq 5050 | . 2 ⊢ ~Q = {〈x, y〉∣((x ∈ (N × N) ⋀ y ∈ (N × N)) ⋀ ∃z∃w∃v∃u((x = 〈z, w〉 ⋀ y = 〈v, u〉) ⋀ (z ·N u) = (w ·N v)))} | |
| 2 | visset 1820 | . . 3 ⊢ x ∈ V | |
| 3 | visset 1820 | . . 3 ⊢ y ∈ V | |
| 4 | 2, 3 | mulcompi 5037 | . 2 ⊢ (x ·N y) = (y ·N x) |
| 5 | 1, 4 | ecopoprdm 4323 | 1 ⊢ dom ~Q = (N × N) |
| Colors of variables: wff set class |
| Syntax hints: = wceq 960 × cxp 3182 dom cdm 3184 Ncnpi 4985 ·N cmi 4987 ~Q ceq 4991 |
| This theorem is referenced by: enqeceq 5060 0npq 5063 addpipq 5067 mulpipq 5068 ordpipq 5069 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 966 ax-gen 967 ax-8 968 ax-9 969 ax-10 970 ax-11 971 ax-12 972 ax-13 973 ax-14 974 ax-17 975 ax-4 977 ax-5o 979 ax-6o 982 ax-9o 1129 ax-10o 1146 ax-16 1216 ax-11o 1224 ax-ext 1466 ax-rep 2706 ax-sep 2716 ax-nul 2723 ax-pow 2756 ax-pr 2793 ax-un 2880 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 780 df-3an 781 df-ex 985 df-sb 1178 df-eu 1388 df-mo 1389 df-clab 1471 df-cleq 1476 df-clel 1479 df-ne 1594 df-ral 1656 df-rex 1657 df-reu 1658 df-rab 1659 df-v 1819 df-sbc 1949 df-csb 2010 df-dif 2058 df-un 2059 df-in 2060 df-ss 2062 df-nul 2290 df-if 2372 df-pw 2412 df-sn 2422 df-pr 2423 df-tp 2425 df-op 2426 df-uni 2516 df-int 2546 df-iun 2580 df-br 2633 df-opab 2680 df-tr 2694 df-eprel 2846 df-id 2849 df-po 2854 df-so 2864 df-fr 2931 df-we 2948 df-ord 2965 df-on 2966 df-lim 2967 df-suc 2968 df-om 3146 df-xp 3198 df-rel 3199 df-cnv 3200 df-co 3201 df-dm 3202 df-rn 3203 df-res 3204 df-ima 3205 df-fun 3206 df-fn 3207 df-f 3208 df-fv 3212 df-rdg 3946 df-opr 3979 df-oprab 3980 df-1st 4093 df-2nd 4094 df-oadd 4149 df-omul 4150 df-ni 5013 df-mi 5015 df-enq 5050 |