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Mirrors > Home > MPE Home > Th. List > fisuppfi | Structured version Visualization version GIF version |
Description: A function on a finite set is finitely supported. (Contributed by Mario Carneiro, 20-Jun-2015.) |
Ref | Expression |
---|---|
fisuppfi.1 | ⊢ (𝜑 → 𝐴 ∈ Fin) |
fisuppfi.2 | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
Ref | Expression |
---|---|
fisuppfi | ⊢ (𝜑 → (◡𝐹 “ 𝐶) ∈ Fin) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fisuppfi.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
2 | cnvimass 5951 | . . 3 ⊢ (◡𝐹 “ 𝐶) ⊆ dom 𝐹 | |
3 | fisuppfi.2 | . . 3 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
4 | 2, 3 | fssdm 6532 | . 2 ⊢ (𝜑 → (◡𝐹 “ 𝐶) ⊆ 𝐴) |
5 | 1, 4 | ssfid 8743 | 1 ⊢ (𝜑 → (◡𝐹 “ 𝐶) ∈ Fin) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2114 ◡ccnv 5556 “ cima 5560 ⟶wf 6353 Fincfn 8511 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-om 7583 df-er 8291 df-en 8512 df-fin 8515 |
This theorem is referenced by: fdmfisuppfi 8844 fsumss 15084 fprodss 15304 fply1 30933 fidmfisupp 41469 |
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