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Mirrors > Home > ILE Home > Th. List > elrnrexdm | Unicode version |
Description: For any element in the range of a function there is an element in the domain of the function for which the function value is the element of the range. (Contributed by Alexander van der Vekens, 8-Dec-2017.) |
Ref | Expression |
---|---|
elrnrexdm |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqidd 2194 |
. . . . . 6
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2 | 1 | ancli 323 |
. . . . 5
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3 | 2 | adantl 277 |
. . . 4
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4 | eqeq2 2203 |
. . . . 5
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5 | 4 | rspcev 2864 |
. . . 4
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6 | 3, 5 | syl 14 |
. . 3
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7 | 6 | ex 115 |
. 2
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8 | funfn 5284 |
. . 3
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9 | eqeq2 2203 |
. . . 4
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10 | 9 | rexrn 5695 |
. . 3
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11 | 8, 10 | sylbi 121 |
. 2
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12 | 7, 11 | sylibd 149 |
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-sbc 2986 df-un 3157 df-in 3159 df-ss 3166 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-br 4030 df-opab 4091 df-mpt 4092 df-id 4324 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-rn 4670 df-iota 5215 df-fun 5256 df-fn 5257 df-fv 5262 |
This theorem is referenced by: cc2lem 7326 ennnfonelemrnh 12573 ennnfonelemf1 12575 exmidsbthrlem 15512 |
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