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Mirrors > Home > ILE Home > Th. List > fimadmfo | Unicode version |
Description: A function is a function onto the image of its domain. (Contributed by AV, 1-Dec-2022.) |
Ref | Expression |
---|---|
fimadmfo |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fdm 5401 |
. 2
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2 | ffn 5395 |
. . . . 5
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3 | 2 | adantr 276 |
. . . 4
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4 | dffn4 5474 |
. . . 4
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5 | 3, 4 | sylib 122 |
. . 3
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6 | imaeq2 4995 |
. . . . . . 7
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7 | imadmrn 5009 |
. . . . . . 7
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8 | 6, 7 | eqtrdi 2242 |
. . . . . 6
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9 | 8 | eqcoms 2196 |
. . . . 5
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10 | 9 | adantl 277 |
. . . 4
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11 | foeq3 5466 |
. . . 4
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12 | 10, 11 | syl 14 |
. . 3
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13 | 5, 12 | mpbird 167 |
. 2
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14 | 1, 13 | mpdan 421 |
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 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-14 2167 ax-ext 2175 ax-sep 4147 ax-pow 4203 ax-pr 4238 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 df-rex 2478 df-v 2762 df-un 3157 df-in 3159 df-ss 3166 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-br 4030 df-opab 4091 df-xp 4661 df-cnv 4663 df-dm 4665 df-rn 4666 df-res 4667 df-ima 4668 df-fn 5249 df-f 5250 df-fo 5252 |
This theorem is referenced by: wrdsymb 10931 |
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