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| Mirrors > Home > MPE Home > Th. List > ccatfn | Structured version Visualization version GIF version | ||
| Description: The concatenation operator is a two-argument function. (Contributed by Mario Carneiro, 27-Sep-2015.) (Proof shortened by AV, 29-Apr-2020.) |
| Ref | Expression |
|---|---|
| ccatfn | ⊢ ++ Fn (V × V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-concat 14716 | . 2 ⊢ ++ = (𝑠 ∈ V, 𝑡 ∈ V ↦ (𝑥 ∈ (0..^((♯‘𝑠) + (♯‘𝑡))) ↦ if(𝑥 ∈ (0..^(♯‘𝑠)), (𝑠‘𝑥), (𝑡‘(𝑥 − (♯‘𝑠)))))) | |
| 2 | ovex 7453 | . . 3 ⊢ (0..^((♯‘𝑠) + (♯‘𝑡))) ∈ V | |
| 3 | 2 | mptex 7229 | . 2 ⊢ (𝑥 ∈ (0..^((♯‘𝑠) + (♯‘𝑡))) ↦ if(𝑥 ∈ (0..^(♯‘𝑠)), (𝑠‘𝑥), (𝑡‘(𝑥 − (♯‘𝑠))))) ∈ V |
| 4 | 1, 3 | fnmpoi 8081 | 1 ⊢ ++ Fn (V × V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 Vcvv 3451 ifcif 4482 ↦ cmpt 5186 × cxp 5649 Fn wfn 6533 ‘cfv 6538 (class class class)co 7420 0cc0 11200 + caddc 11203 − cmin 11541 ..^cfzo 13788 ♯chash 14474 ++ cconcat 14715 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pr 5391 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-concat 14716 |
| This theorem is used by: frmdplusg 19050 elrgspnlem2 33804 |
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