Theorem imassrn 4957

Description: The image of a class is a subset of its range. Theorem 3.16(xi) of [Monk1] p. 39. (Contributed by NM, 31-Mar-1995.)

Assertion

Ref	Expression
imassrn	⊢ (𝐴 “ 𝐵) ⊆ ran 𝐴

Proof of Theorem imassrn

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		exsimpr 1606	. . 3 ⊢ (∃𝑥(𝑥 ∈ 𝐵 ∧ ⟨𝑥, 𝑦⟩ ∈ 𝐴) → ∃𝑥⟨𝑥, 𝑦⟩ ∈ 𝐴)
2	1	ss2abi 3214	. 2 ⊢ {𝑦 ∣ ∃𝑥(𝑥 ∈ 𝐵 ∧ ⟨𝑥, 𝑦⟩ ∈ 𝐴)} ⊆ {𝑦 ∣ ∃𝑥⟨𝑥, 𝑦⟩ ∈ 𝐴}
3		dfima3 4949	. 2 ⊢ (𝐴 “ 𝐵) = {𝑦 ∣ ∃𝑥(𝑥 ∈ 𝐵 ∧ ⟨𝑥, 𝑦⟩ ∈ 𝐴)}
4		dfrn3 4793	. 2 ⊢ ran 𝐴 = {𝑦 ∣ ∃𝑥⟨𝑥, 𝑦⟩ ∈ 𝐴}
5	2, 3, 4	3sstr4i 3183	1 ⊢ (𝐴 “ 𝐵) ⊆ ran 𝐴

Syntax hints:   ∧ wa 103  ∃wex 1480   ∈ wcel 2136  {cab 2151   ⊆ wss 3116  ⟨cop 3579  ran crn 4605   “ cima 4607

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187

This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-br 3983  df-opab 4044  df-xp 4610  df-cnv 4612  df-dm 4614  df-rn 4615  df-res 4616  df-ima 4617

This theorem is referenced by:  imaexg  4958  0ima  4964  cnvimass  4967  fimacnv  5614  f1opw2  6044  smores2  6262  ecss  6542  f1imaen2g  6759  fopwdom  6802  ssenen  6817  phplem4dom  6828  isinfinf  6863  fiintim  6894  sbthlem2  6923  sbthlemi3  6924  sbthlemi5  6926  sbthlemi6  6927  ctssdccl  7076  ctinf  12363  ssnnctlemct  12379  cnptoprest2  12890  hmeontr  12963  hmeores  12965  tgqioo  13197