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Mirrors > Home > ILE Home > Th. List > opexg | GIF version |
Description: An ordered pair of sets is a set. (Contributed by Jim Kingdon, 11-Jan-2019.) |
Ref | Expression |
---|---|
opexg | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 〈𝐴, 𝐵〉 ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfopg 3711 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 〈𝐴, 𝐵〉 = {{𝐴}, {𝐴, 𝐵}}) | |
2 | elex 2700 | . . . . 5 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V) | |
3 | snexg 4116 | . . . . 5 ⊢ (𝐴 ∈ V → {𝐴} ∈ V) | |
4 | 2, 3 | syl 14 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ∈ V) |
5 | 4 | adantr 274 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {𝐴} ∈ V) |
6 | elex 2700 | . . . 4 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V) | |
7 | prexg 4141 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → {𝐴, 𝐵} ∈ V) | |
8 | 2, 6, 7 | syl2an 287 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {𝐴, 𝐵} ∈ V) |
9 | prexg 4141 | . . 3 ⊢ (({𝐴} ∈ V ∧ {𝐴, 𝐵} ∈ V) → {{𝐴}, {𝐴, 𝐵}} ∈ V) | |
10 | 5, 8, 9 | syl2anc 409 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → {{𝐴}, {𝐴, 𝐵}} ∈ V) |
11 | 1, 10 | eqeltrd 2217 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 〈𝐴, 𝐵〉 ∈ V) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ∈ wcel 1481 Vcvv 2689 {csn 3532 {cpr 3533 〈cop 3535 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-v 2691 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 |
This theorem is referenced by: opex 4159 otexg 4160 opeliunxp 4602 opbrop 4626 relsnopg 4651 opswapg 5033 elxp4 5034 elxp5 5035 resfunexg 5649 fliftel 5702 fliftel1 5703 oprabid 5811 ovexg 5813 eloprabga 5866 op1st 6052 op2nd 6053 ot1stg 6058 ot2ndg 6059 ot3rdgg 6060 elxp6 6075 mpofvex 6109 algrflem 6134 algrflemg 6135 mpoxopoveq 6145 brtposg 6159 tfr0dm 6227 tfrlemisucaccv 6230 tfrlemibxssdm 6232 tfrlemibfn 6233 tfrlemi14d 6238 tfr1onlemsucaccv 6246 tfr1onlembxssdm 6248 tfr1onlembfn 6249 tfr1onlemres 6254 tfrcllemsucaccv 6259 tfrcllembxssdm 6261 tfrcllembfn 6262 tfrcllemres 6267 fnfi 6833 djulclb 6948 inl11 6958 1stinl 6967 2ndinl 6968 1stinr 6969 2ndinr 6970 mulpipq2 7203 enq0breq 7268 addvalex 7676 peano2nnnn 7685 axcnre 7713 frec2uzrdg 10213 frecuzrdg0 10217 frecuzrdgg 10220 frecuzrdg0t 10226 zfz1isolem1 10615 eucalgval2 11770 crth 11936 phimullem 11937 ennnfonelemp1 11955 setsvala 12029 setsex 12030 setsfun 12033 setsfun0 12034 setsresg 12036 setscom 12038 strslfv 12042 setsslid 12048 strle1g 12088 1strbas 12097 2strbasg 12099 2stropg 12100 2strbas1g 12102 2strop1g 12103 rngbaseg 12114 rngplusgg 12115 rngmulrg 12116 srngbased 12121 srngplusgd 12122 srngmulrd 12123 srnginvld 12124 lmodbased 12132 lmodplusgd 12133 lmodscad 12134 lmodvscad 12135 ipsbased 12140 ipsaddgd 12141 ipsmulrd 12142 ipsscad 12143 ipsvscad 12144 ipsipd 12145 topgrpbasd 12150 topgrpplusgd 12151 topgrptsetd 12152 txlm 12487 |
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