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Mirrors > Home > ILE Home > Th. List > dmsnopg | Unicode version |
Description: The domain of a singleton of an ordered pair is the singleton of the first member. (Contributed by Mario Carneiro, 26-Apr-2015.) |
Ref | Expression |
---|---|
dmsnopg |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 2692 |
. . . . . 6
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2 | vex 2692 |
. . . . . 6
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3 | 1, 2 | opth1 4166 |
. . . . 5
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4 | 3 | exlimiv 1578 |
. . . 4
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5 | opeq1 3713 |
. . . . 5
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6 | opeq2 3714 |
. . . . . . 7
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7 | 6 | eqeq1d 2149 |
. . . . . 6
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8 | 7 | spcegv 2777 |
. . . . 5
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9 | 5, 8 | syl5 32 |
. . . 4
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10 | 4, 9 | impbid2 142 |
. . 3
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11 | 1 | eldm2 4745 |
. . . 4
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12 | 1, 2 | opex 4159 |
. . . . . 6
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13 | 12 | elsn 3548 |
. . . . 5
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14 | 13 | exbii 1585 |
. . . 4
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15 | 11, 14 | bitri 183 |
. . 3
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16 | velsn 3549 |
. . 3
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17 | 10, 15, 16 | 3bitr4g 222 |
. 2
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18 | 17 | eqrdv 2138 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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 df-br 3938 df-dm 4557 |
This theorem is referenced by: dmpropg 5019 dmsnop 5020 rnsnopg 5025 elxp4 5034 fnsng 5178 funprg 5181 funtpg 5182 fntpg 5187 ennnfonelemhdmp1 11958 ennnfonelemkh 11961 setsvala 12029 setsresg 12036 setscom 12038 setsslid 12048 strle1g 12088 |
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