Theorem fssres 5497

Description: Restriction of a function with a subclass of its domain. (Contributed by NM, 23-Sep-2004.)

Assertion

Ref	Expression
fssres	⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶⟶𝐵)

Proof of Theorem fssres

Step	Hyp	Ref	Expression
1		df-f 5318	. . 3 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵))
2		fnssres 5432	. . . . 5 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶) Fn 𝐶)
3		resss 5025	. . . . . . 7 ⊢ (𝐹 ↾ 𝐶) ⊆ 𝐹
4		rnss 4950	. . . . . . 7 ⊢ ((𝐹 ↾ 𝐶) ⊆ 𝐹 → ran (𝐹 ↾ 𝐶) ⊆ ran 𝐹)
5	3, 4	ax-mp 5	. . . . . 6 ⊢ ran (𝐹 ↾ 𝐶) ⊆ ran 𝐹
6		sstr 3232	. . . . . 6 ⊢ ((ran (𝐹 ↾ 𝐶) ⊆ ran 𝐹 ∧ ran 𝐹 ⊆ 𝐵) → ran (𝐹 ↾ 𝐶) ⊆ 𝐵)
7	5, 6	mpan 424	. . . . 5 ⊢ (ran 𝐹 ⊆ 𝐵 → ran (𝐹 ↾ 𝐶) ⊆ 𝐵)
8	2, 7	anim12i 338	. . . 4 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐶 ⊆ 𝐴) ∧ ran 𝐹 ⊆ 𝐵) → ((𝐹 ↾ 𝐶) Fn 𝐶 ∧ ran (𝐹 ↾ 𝐶) ⊆ 𝐵))
9	8	an32s 568	. . 3 ⊢ (((𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) ∧ 𝐶 ⊆ 𝐴) → ((𝐹 ↾ 𝐶) Fn 𝐶 ∧ ran (𝐹 ↾ 𝐶) ⊆ 𝐵))
10	1, 9	sylanb 284	. 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐶 ⊆ 𝐴) → ((𝐹 ↾ 𝐶) Fn 𝐶 ∧ ran (𝐹 ↾ 𝐶) ⊆ 𝐵))
11		df-f 5318	. 2 ⊢ ((𝐹 ↾ 𝐶):𝐶⟶𝐵 ↔ ((𝐹 ↾ 𝐶) Fn 𝐶 ∧ ran (𝐹 ↾ 𝐶) ⊆ 𝐵))
12	10, 11	sylibr 134	1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶⟶𝐵)

Syntax hints:   → wi 4   ∧ wa 104   ⊆ wss 3197  ran crn 4717   ↾ cres 4718   Fn wfn 5309  ⟶wf 5310

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-14 2203  ax-ext 2211  ax-sep 4201  ax-pow 4257  ax-pr 4292

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  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-br 4083  df-opab 4145  df-xp 4722  df-rel 4723  df-cnv 4724  df-co 4725  df-dm 4726  df-rn 4727  df-res 4728  df-fun 5316  df-fn 5317  df-f 5318

This theorem is referenced by:  fssresd  5498  fssres2  5499  fresin  5500  f1ssres  5536  feqresmpt  5681  f2ndf  6362  elmapssres  6810  pmresg  6813  finomni  7295  fseq1p1m1  10278  seqf1oglem2  10729  wrdred1  11100  resmhm  13506  resghm  13783  hmeores  14974  limcdifap  15321  012of  16288  2o01f  16289