Theorem unirnffid 8413

Description: The union of the range of a function from a finite set into the class of finite sets is finite. Deduction form. (Contributed by David Moews, 1-May-2017.)

Hypotheses

Ref	Expression
unirnffid.1	⊢ (𝜑 → 𝐹:𝑇⟶Fin)
unirnffid.2	⊢ (𝜑 → 𝑇 ∈ Fin)

Assertion

Ref	Expression
unirnffid	⊢ (𝜑 → ∪ ran 𝐹 ∈ Fin)

Proof of Theorem unirnffid

Step	Hyp	Ref	Expression
1		unirnffid.1	. . . . 5 ⊢ (𝜑 → 𝐹:𝑇⟶Fin)
2		ffn 6185	. . . . 5 ⊢ (𝐹:𝑇⟶Fin → 𝐹 Fn 𝑇)
3	1, 2	syl 17	. . . 4 ⊢ (𝜑 → 𝐹 Fn 𝑇)
4		unirnffid.2	. . . 4 ⊢ (𝜑 → 𝑇 ∈ Fin)
5		fnfi 8393	. . . 4 ⊢ ((𝐹 Fn 𝑇 ∧ 𝑇 ∈ Fin) → 𝐹 ∈ Fin)
6	3, 4, 5	syl2anc 565	. . 3 ⊢ (𝜑 → 𝐹 ∈ Fin)
7		rnfi 8404	. . 3 ⊢ (𝐹 ∈ Fin → ran 𝐹 ∈ Fin)
8	6, 7	syl 17	. 2 ⊢ (𝜑 → ran 𝐹 ∈ Fin)
9		frn 6193	. . 3 ⊢ (𝐹:𝑇⟶Fin → ran 𝐹 ⊆ Fin)
10	1, 9	syl 17	. 2 ⊢ (𝜑 → ran 𝐹 ⊆ Fin)
11		unifi 8410	. 2 ⊢ ((ran 𝐹 ∈ Fin ∧ ran 𝐹 ⊆ Fin) → ∪ ran 𝐹 ∈ Fin)
12	8, 10, 11	syl2anc 565	1 ⊢ (𝜑 → ∪ ran 𝐹 ∈ Fin)

Syntax hints:   → wi 4   ∈ wcel 2144   ⊆ wss 3721  ∪ cuni 4572  ran crn 5250   Fn wfn 6026  ⟶wf 6027  Fincfn 8108

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-8 2146  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750  ax-sep 4912  ax-nul 4920  ax-pow 4971  ax-pr 5034  ax-un 7095

This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3or 1071  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-eu 2621  df-mo 2622  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-ne 2943  df-ral 3065  df-rex 3066  df-reu 3067  df-rab 3069  df-v 3351  df-sbc 3586  df-csb 3681  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-pss 3737  df-nul 4062  df-if 4224  df-pw 4297  df-sn 4315  df-pr 4317  df-tp 4319  df-op 4321  df-uni 4573  df-int 4610  df-iun 4654  df-br 4785  df-opab 4845  df-mpt 4862  df-tr 4885  df-id 5157  df-eprel 5162  df-po 5170  df-so 5171  df-fr 5208  df-we 5210  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-pred 5823  df-ord 5869  df-on 5870  df-lim 5871  df-suc 5872  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-ov 6795  df-oprab 6796  df-mpt2 6797  df-om 7212  df-1st 7314  df-2nd 7315  df-wrecs 7558  df-recs 7620  df-rdg 7658  df-1o 7712  df-oadd 7716  df-er 7895  df-en 8109  df-dom 8110  df-fin 8112

This theorem is referenced by:  marypha2  8500  acsinfd  17387