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Theorem fsuppinisegfi 32660
Description: The initial segment (𝐹 “ {𝑌}) of a nonzero 𝑌 is finite if 𝐹 has finite support. (Contributed by Thierry Arnoux, 21-Jun-2024.)
Hypotheses
Ref Expression
fsuppinisegfi.1 (𝜑𝐹𝑉)
fsuppinisegfi.2 (𝜑0𝑊)
fsuppinisegfi.3 (𝜑𝑌 ∈ (V ∖ { 0 }))
fsuppinisegfi.4 (𝜑𝐹 finSupp 0 )
Assertion
Ref Expression
fsuppinisegfi (𝜑 → (𝐹 “ {𝑌}) ∈ Fin)

Proof of Theorem fsuppinisegfi
StepHypRef Expression
1 fsuppinisegfi.4 . . 3 (𝜑𝐹 finSupp 0 )
21fsuppimpd 9296 . 2 (𝜑 → (𝐹 supp 0 ) ∈ Fin)
3 fsuppinisegfi.3 . . . . 5 (𝜑𝑌 ∈ (V ∖ { 0 }))
43snssd 4769 . . . 4 (𝜑 → {𝑌} ⊆ (V ∖ { 0 }))
5 imass2 6062 . . . 4 ({𝑌} ⊆ (V ∖ { 0 }) → (𝐹 “ {𝑌}) ⊆ (𝐹 “ (V ∖ { 0 })))
64, 5syl 17 . . 3 (𝜑 → (𝐹 “ {𝑌}) ⊆ (𝐹 “ (V ∖ { 0 })))
7 fsuppinisegfi.1 . . . 4 (𝜑𝐹𝑉)
8 fsuppinisegfi.2 . . . 4 (𝜑0𝑊)
9 suppimacnvss 8129 . . . 4 ((𝐹𝑉0𝑊) → (𝐹 “ (V ∖ { 0 })) ⊆ (𝐹 supp 0 ))
107, 8, 9syl2anc 584 . . 3 (𝜑 → (𝐹 “ (V ∖ { 0 })) ⊆ (𝐹 supp 0 ))
116, 10sstrd 3954 . 2 (𝜑 → (𝐹 “ {𝑌}) ⊆ (𝐹 supp 0 ))
122, 11ssfid 9188 1 (𝜑 → (𝐹 “ {𝑌}) ∈ Fin)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2109  Vcvv 3444  cdif 3908  wss 3911  {csn 4585   class class class wbr 5102  ccnv 5630  cima 5634  (class class class)co 7369   supp csupp 8116  Fincfn 8895   finSupp cfsupp 9288
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5246  ax-nul 5256  ax-pr 5382  ax-un 7691
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3352  df-rab 3403  df-v 3446  df-sbc 3751  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-pss 3931  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-br 5103  df-opab 5165  df-tr 5210  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-ord 6323  df-on 6324  df-lim 6325  df-suc 6326  df-iota 6452  df-fun 6501  df-fn 6502  df-f 6503  df-f1 6504  df-fo 6505  df-f1o 6506  df-fv 6507  df-ov 7372  df-oprab 7373  df-mpo 7374  df-om 7823  df-supp 8117  df-1o 8411  df-en 8896  df-fin 8899  df-fsupp 9289
This theorem is referenced by:  elrspunidl  33392
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