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Mirrors > Home > ILE Home > Th. List > fsnunf | Unicode version |
Description: Adjoining a point to a function gives a function. (Contributed by Stefan O'Rear, 28-Feb-2015.) |
Ref | Expression |
---|---|
fsnunf |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 946 |
. . 3
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2 | simp2l 972 |
. . . . 5
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3 | simp3 948 |
. . . . 5
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4 | f1osng 5329 |
. . . . 5
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5 | 2, 3, 4 | syl2anc 404 |
. . . 4
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6 | f1of 5288 |
. . . 4
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7 | 5, 6 | syl 14 |
. . 3
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8 | simp2r 973 |
. . . 4
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9 | disjsn 3524 |
. . . 4
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10 | 8, 9 | sylibr 133 |
. . 3
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11 | fun 5218 |
. . 3
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12 | 1, 7, 10, 11 | syl21anc 1180 |
. 2
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13 | snssi 3603 |
. . . . 5
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14 | 13 | 3ad2ant3 969 |
. . . 4
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15 | ssequn2 3188 |
. . . 4
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16 | 14, 15 | sylib 121 |
. . 3
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17 | feq3 5181 |
. . 3
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18 | 16, 17 | syl 14 |
. 2
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19 | 12, 18 | mpbid 146 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 582 ax-in2 583 ax-io 668 ax-5 1388 ax-7 1389 ax-gen 1390 ax-ie1 1434 ax-ie2 1435 ax-8 1447 ax-10 1448 ax-11 1449 ax-i12 1450 ax-bndl 1451 ax-4 1452 ax-14 1457 ax-17 1471 ax-i9 1475 ax-ial 1479 ax-i5r 1480 ax-ext 2077 ax-sep 3978 ax-pow 4030 ax-pr 4060 |
This theorem depends on definitions: df-bi 116 df-3an 929 df-tru 1299 df-fal 1302 df-nf 1402 df-sb 1700 df-eu 1958 df-mo 1959 df-clab 2082 df-cleq 2088 df-clel 2091 df-nfc 2224 df-ral 2375 df-rex 2376 df-v 2635 df-dif 3015 df-un 3017 df-in 3019 df-ss 3026 df-nul 3303 df-pw 3451 df-sn 3472 df-pr 3473 df-op 3475 df-br 3868 df-opab 3922 df-id 4144 df-xp 4473 df-rel 4474 df-cnv 4475 df-co 4476 df-dm 4477 df-rn 4478 df-fun 5051 df-fn 5052 df-f 5053 df-f1 5054 df-fo 5055 df-f1o 5056 |
This theorem is referenced by: tfrcllemsucfn 6156 |
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