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Theorem fnima 4960
 Description: The image of a function's domain is its range. (Contributed by NM, 4-Nov-2004.) (Proof shortened by Andrew Salmon, 17-Sep-2011.)
Assertion
Ref Expression
fnima (𝐹 Fn A → (𝐹A) = ran 𝐹)

Proof of Theorem fnima
StepHypRef Expression
1 df-ima 4301 . 2 (𝐹A) = ran (𝐹A)
2 fnresdm 4951 . . 3 (𝐹 Fn A → (𝐹A) = 𝐹)
32rneqd 4506 . 2 (𝐹 Fn A → ran (𝐹A) = ran 𝐹)
41, 3syl5eq 2081 1 (𝐹 Fn A → (𝐹A) = ran 𝐹)
 Colors of variables: wff set class Syntax hints:   → wi 4   = wceq 1242  ran crn 4289   ↾ cres 4290   “ cima 4291   Fn wfn 4840 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-bnd 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-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-xp 4294  df-rel 4295  df-cnv 4296  df-dm 4298  df-rn 4299  df-res 4300  df-ima 4301  df-fun 4847  df-fn 4848 This theorem is referenced by: (None)
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