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Mirrors > Home > ILE Home > Th. List > funmo | Unicode version |
Description: A function has at most one value for each argument. (Contributed by NM, 24-May-1998.) |
Ref | Expression |
---|---|
funmo |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dffun6 4859 |
. . . . . 6
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2 | 1 | simplbi 259 |
. . . . 5
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3 | brrelex 4325 |
. . . . . 6
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4 | 3 | ex 108 |
. . . . 5
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5 | 2, 4 | syl 14 |
. . . 4
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6 | 5 | ancrd 309 |
. . 3
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7 | 6 | alrimiv 1751 |
. 2
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8 | breq1 3758 |
. . . . . . 7
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9 | 8 | mobidv 1933 |
. . . . . 6
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10 | 9 | imbi2d 219 |
. . . . 5
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11 | 1 | simprbi 260 |
. . . . . 6
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12 | 11 | 19.21bi 1447 |
. . . . 5
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13 | 10, 12 | vtoclg 2607 |
. . . 4
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14 | 13 | com12 27 |
. . 3
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15 | moanimv 1972 |
. . 3
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16 | 14, 15 | sylibr 137 |
. 2
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17 | moim 1961 |
. 2
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18 | 7, 16, 17 | sylc 56 |
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 99 ax-ia2 100 ax-ia3 101 ax-io 629 ax-5 1333 ax-7 1334 ax-gen 1335 ax-ie1 1379 ax-ie2 1380 ax-8 1392 ax-10 1393 ax-11 1394 ax-i12 1395 ax-bndl 1396 ax-4 1397 ax-14 1402 ax-17 1416 ax-i9 1420 ax-ial 1424 ax-i5r 1425 ax-ext 2019 ax-sep 3866 ax-pow 3918 ax-pr 3935 |
This theorem depends on definitions: df-bi 110 df-3an 886 df-tru 1245 df-nf 1347 df-sb 1643 df-eu 1900 df-mo 1901 df-clab 2024 df-cleq 2030 df-clel 2033 df-nfc 2164 df-ral 2305 df-rex 2306 df-v 2553 df-un 2916 df-in 2918 df-ss 2925 df-pw 3353 df-sn 3373 df-pr 3374 df-op 3376 df-br 3756 df-opab 3810 df-id 4021 df-xp 4294 df-rel 4295 df-cnv 4296 df-co 4297 df-fun 4847 |
This theorem is referenced by: funeu 4869 funco 4883 imadif 4922 fneu 4946 dff3im 5255 |
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