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Mirrors > Home > MPE Home > Th. List > df-fn | Structured version Visualization version GIF version |
Description: Define a function with domain. Definition 6.15(1) of [TakeutiZaring] p. 27. For alternate definitions, see dffn2 6489, dffn3 6499, dffn4 6571, and dffn5 6699. (Contributed by NM, 1-Aug-1994.) |
Ref | Expression |
---|---|
df-fn | ⊢ (𝐴 Fn 𝐵 ↔ (Fun 𝐴 ∧ dom 𝐴 = 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cA | . . 3 class 𝐴 | |
2 | cB | . . 3 class 𝐵 | |
3 | 1, 2 | wfn 6319 | . 2 wff 𝐴 Fn 𝐵 |
4 | 1 | wfun 6318 | . . 3 wff Fun 𝐴 |
5 | 1 | cdm 5519 | . . . 4 class dom 𝐴 |
6 | 5, 2 | wceq 1538 | . . 3 wff dom 𝐴 = 𝐵 |
7 | 4, 6 | wa 399 | . 2 wff (Fun 𝐴 ∧ dom 𝐴 = 𝐵) |
8 | 3, 7 | wb 209 | 1 wff (𝐴 Fn 𝐵 ↔ (Fun 𝐴 ∧ dom 𝐴 = 𝐵)) |
Colors of variables: wff setvar class |
This definition is referenced by: funfn 6354 fnsng 6376 fnprg 6383 fntpg 6384 fntp 6385 fncnv 6397 fneq1 6414 fneq2 6415 nffn 6422 fnfun 6423 fndm 6425 fnun 6434 fnco 6437 fnssresb 6441 fnres 6446 idfn 6447 fnresiOLD 6449 fn0 6451 mptfnf 6455 fnopabg 6457 sbcfng 6484 fdmrn 6512 fcoi1 6526 f00 6535 f1cnvcnv 6559 fores 6575 dff1o4 6598 foimacnv 6607 funfv 6725 fvimacnvALT 6804 respreima 6813 dff3 6843 fpr 6893 fnsnb 6905 fnprb 6948 fnex 6957 fliftf 7047 fnoprabg 7254 fiun 7626 f1iun 7627 f1oweALT 7655 curry1 7782 curry2 7785 tposfn2 7897 wfrlem13 7950 wfr1 7956 tfrlem10 8006 tfr1 8016 frfnom 8053 undifixp 8481 sbthlem9 8619 fodomr 8652 rankf 9207 cardf2 9356 axdc3lem2 9862 nqerf 10341 axaddf 10556 axmulf 10557 uzrdgfni 13321 hashkf 13688 shftfn 14424 imasaddfnlem 16793 imasvscafn 16802 fntopon 21529 cnextf 22671 ftc1cn 24646 grporn 28304 ffsrn 30491 measdivcstALTV 31594 bnj1422 32219 satff 32770 frrlem11 33246 frrlem12 33247 fpr1 33252 frr1 33257 nofnbday 33272 scutf 33386 fnsingle 33493 fnimage 33503 imageval 33504 dfrecs2 33524 dfrdg4 33525 ftc1cnnc 35129 fnresfnco 43633 funcoressn 43634 afvco2 43732 |
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