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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 14274 | . 2 ⊢ ++ = (𝑠 ∈ V, 𝑡 ∈ V ↦ (𝑥 ∈ (0..^((♯‘𝑠) + (♯‘𝑡))) ↦ if(𝑥 ∈ (0..^(♯‘𝑠)), (𝑠‘𝑥), (𝑡‘(𝑥 − (♯‘𝑠)))))) | |
2 | ovex 7308 | . . 3 ⊢ (0..^((♯‘𝑠) + (♯‘𝑡))) ∈ V | |
3 | 2 | mptex 7099 | . 2 ⊢ (𝑥 ∈ (0..^((♯‘𝑠) + (♯‘𝑡))) ↦ if(𝑥 ∈ (0..^(♯‘𝑠)), (𝑠‘𝑥), (𝑡‘(𝑥 − (♯‘𝑠))))) ∈ V |
4 | 1, 3 | fnmpoi 7910 | 1 ⊢ ++ Fn (V × V) |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2106 Vcvv 3432 ifcif 4459 ↦ cmpt 5157 × cxp 5587 Fn wfn 6428 ‘cfv 6433 (class class class)co 7275 0cc0 10871 + caddc 10874 − cmin 11205 ..^cfzo 13382 ♯chash 14044 ++ cconcat 14273 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-oprab 7279 df-mpo 7280 df-1st 7831 df-2nd 7832 df-concat 14274 |
This theorem is referenced by: frmdplusg 18493 |
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