Theorem imaexg 5078

Description: The image of a set is a set. Theorem 3.17 of [Monk1] p. 39. (Contributed by NM, 24-Jul-1995.)

Assertion

Ref	Expression
imaexg	⊢ (𝐴 ∈ 𝑉 → (𝐴 “ 𝐵) ∈ V)

Proof of Theorem imaexg

Step	Hyp	Ref	Expression
1		imassrn 5075	. 2 ⊢ (𝐴 “ 𝐵) ⊆ ran 𝐴
2		rnexg 4985	. 2 ⊢ (𝐴 ∈ 𝑉 → ran 𝐴 ∈ V)
3		ssexg 4222	. 2 ⊢ (((𝐴 “ 𝐵) ⊆ ran 𝐴 ∧ ran 𝐴 ∈ V) → (𝐴 “ 𝐵) ∈ V)
4	1, 2, 3	sylancr 414	1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 “ 𝐵) ∈ V)

Syntax hints:   → wi 4   ∈ wcel 2200  Vcvv 2799   ⊆ wss 3197  ran crn 4717   “ cima 4719

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-pow 4257  ax-pr 4292  ax-un 4521

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-br 4083  df-opab 4145  df-xp 4722  df-cnv 4724  df-dm 4726  df-rn 4727  df-res 4728  df-ima 4729

This theorem is referenced by:  imaex  5079  ecexg  6674  fopwdom  6985  isinfinf  7047  isunitd  14055