Theorem fsupprnfi 32894

Description: Finite support implies finite range. (Contributed by Thierry Arnoux, 24-Jun-2024.)

Assertion

Ref	Expression
fsupprnfi	⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → ran 𝐹 ∈ Fin)

Proof of Theorem fsupprnfi

Step	Hyp	Ref	Expression
1		snfi 9024	. 2 ⊢ { 0 } ∈ Fin
2		simpll 776	. . . 4 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → Fun 𝐹)
3		simplr 778	. . . 4 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → 𝐹 ∈ 𝑉)
4		simprl 780	. . . 4 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → 0 ∈ 𝑊)
5		ressupprn 32892	. . . 4 ⊢ ((Fun 𝐹 ∧ 𝐹 ∈ 𝑉 ∧ 0 ∈ 𝑊) → ran (𝐹 ↾ (𝐹 supp 0 )) = (ran 𝐹 ∖ { 0 }))
6	2, 3, 4, 5	syl3anc 1390	. . 3 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → ran (𝐹 ↾ (𝐹 supp 0 )) = (ran 𝐹 ∖ { 0 }))
7		simprr 782	. . . . 5 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → 𝐹 finSupp 0 )
8	7	fsuppimpd 9315	. . . 4 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → (𝐹 supp 0 ) ∈ Fin)
9		suppssdm 8157	. . . . . 6 ⊢ (𝐹 supp 0 ) ⊆ dom 𝐹
10		ssdmres 5999	. . . . . 6 ⊢ ((𝐹 supp 0 ) ⊆ dom 𝐹 ↔ dom (𝐹 ↾ (𝐹 supp 0 )) = (𝐹 supp 0 ))
11	9, 10	mpbi 232	. . . . 5 ⊢ dom (𝐹 ↾ (𝐹 supp 0 )) = (𝐹 supp 0 )
12	2	funresd 6564	. . . . . 6 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → Fun (𝐹 ↾ (𝐹 supp 0 )))
13		funforn 6785	. . . . . 6 ⊢ (Fun (𝐹 ↾ (𝐹 supp 0 )) ↔ (𝐹 ↾ (𝐹 supp 0 )):dom (𝐹 ↾ (𝐹 supp 0 ))–onto→ran (𝐹 ↾ (𝐹 supp 0 )))
14	12, 13	sylib 220	. . . . 5 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → (𝐹 ↾ (𝐹 supp 0 )):dom (𝐹 ↾ (𝐹 supp 0 ))–onto→ran (𝐹 ↾ (𝐹 supp 0 )))
15		foeq2 6775	. . . . . 6 ⊢ (dom (𝐹 ↾ (𝐹 supp 0 )) = (𝐹 supp 0 ) → ((𝐹 ↾ (𝐹 supp 0 )):dom (𝐹 ↾ (𝐹 supp 0 ))–onto→ran (𝐹 ↾ (𝐹 supp 0 )) ↔ (𝐹 ↾ (𝐹 supp 0 )):(𝐹 supp 0 )–onto→ran (𝐹 ↾ (𝐹 supp 0 ))))
16	15	biimpa 480	. . . . 5 ⊢ ((dom (𝐹 ↾ (𝐹 supp 0 )) = (𝐹 supp 0 ) ∧ (𝐹 ↾ (𝐹 supp 0 )):dom (𝐹 ↾ (𝐹 supp 0 ))–onto→ran (𝐹 ↾ (𝐹 supp 0 ))) → (𝐹 ↾ (𝐹 supp 0 )):(𝐹 supp 0 )–onto→ran (𝐹 ↾ (𝐹 supp 0 )))
17	11, 14, 16	sylancr 596	. . . 4 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → (𝐹 ↾ (𝐹 supp 0 )):(𝐹 supp 0 )–onto→ran (𝐹 ↾ (𝐹 supp 0 )))
18		fofi 9257	. . . 4 ⊢ (((𝐹 supp 0 ) ∈ Fin ∧ (𝐹 ↾ (𝐹 supp 0 )):(𝐹 supp 0 )–onto→ran (𝐹 ↾ (𝐹 supp 0 ))) → ran (𝐹 ↾ (𝐹 supp 0 )) ∈ Fin)
19	8, 17, 18	syl2anc 593	. . 3 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → ran (𝐹 ↾ (𝐹 supp 0 )) ∈ Fin)
20	6, 19	eqeltrrd 2863	. 2 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → (ran 𝐹 ∖ { 0 }) ∈ Fin)
21		diffib 32720	. . 3 ⊢ ({ 0 } ∈ Fin → (ran 𝐹 ∈ Fin ↔ (ran 𝐹 ∖ { 0 }) ∈ Fin))
22	21	biimpar 481	. 2 ⊢ (({ 0 } ∈ Fin ∧ (ran 𝐹 ∖ { 0 }) ∈ Fin) → ran 𝐹 ∈ Fin)
23	1, 20, 22	sylancr 596	1 ⊢ (((Fun 𝐹 ∧ 𝐹 ∈ 𝑉) ∧ ( 0 ∈ 𝑊 ∧ 𝐹 finSupp 0 )) → ran 𝐹 ∈ Fin)

Syntax hints:   → wi 4   ∧ wa 399   = wceq 1560   ∈ wcel 2142   ∖ cdif 3901   ⊆ wss 3904  {csn 4582   class class class wbr 5100  dom cdm 5647  ran crn 5648   ↾ cres 5649  Fun wfun 6515  –onto→wfo 6519  (class class class)co 7396   supp csupp 8140  Fincfn 8927   finSupp cfsupp 9307

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-rep 5227  ax-sep 5246  ax-nul 5256  ax-pr 5390  ax-un 7718

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3or 1099  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-nf 1804  df-sb 2091  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3077  df-rex 3087  df-reu 3368  df-rab 3415  df-v 3456  df-sbc 3745  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-pss 3924  df-nul 4286  df-if 4481  df-pw 4557  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-iun 4951  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5542  df-eprel 5547  df-po 5555  df-so 5556  df-fr 5600  df-we 5602  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-ord 6349  df-on 6350  df-lim 6351  df-suc 6352  df-iota 6477  df-fun 6523  df-fn 6524  df-f 6525  df-f1 6526  df-fo 6527  df-f1o 6528  df-fv 6529  df-ov 7399  df-oprab 7400  df-mpo 7401  df-om 7847  df-supp 8141  df-1o 8437  df-en 8928  df-dom 8929  df-fin 8931  df-fsupp 9308

This theorem is referenced by:  elrspunidl  33614