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Mirrors > Home > MPE Home > Th. List > Mathboxes > itcoval0mpt | Structured version Visualization version GIF version |
Description: A mapping iterated zero times (defined as identity function). (Contributed by AV, 4-May-2024.) |
Ref | Expression |
---|---|
itcoval0mpt.f | ⊢ 𝐹 = (𝑛 ∈ 𝐴 ↦ 𝐵) |
Ref | Expression |
---|---|
itcoval0mpt | ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊) → ((IterComp‘𝐹)‘0) = (𝑛 ∈ 𝐴 ↦ 𝑛)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | itcoval0mpt.f | . . . . 5 ⊢ 𝐹 = (𝑛 ∈ 𝐴 ↦ 𝐵) | |
2 | 1 | fveq2i 6833 | . . . 4 ⊢ (IterComp‘𝐹) = (IterComp‘(𝑛 ∈ 𝐴 ↦ 𝐵)) |
3 | 2 | fveq1i 6831 | . . 3 ⊢ ((IterComp‘𝐹)‘0) = ((IterComp‘(𝑛 ∈ 𝐴 ↦ 𝐵))‘0) |
4 | mptexg 7158 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (𝑛 ∈ 𝐴 ↦ 𝐵) ∈ V) | |
5 | itcoval0 46424 | . . . 4 ⊢ ((𝑛 ∈ 𝐴 ↦ 𝐵) ∈ V → ((IterComp‘(𝑛 ∈ 𝐴 ↦ 𝐵))‘0) = ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵))) | |
6 | 4, 5 | syl 17 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ((IterComp‘(𝑛 ∈ 𝐴 ↦ 𝐵))‘0) = ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵))) |
7 | 3, 6 | eqtrid 2789 | . 2 ⊢ (𝐴 ∈ 𝑉 → ((IterComp‘𝐹)‘0) = ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵))) |
8 | dmmptg 6185 | . . . 4 ⊢ (∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊 → dom (𝑛 ∈ 𝐴 ↦ 𝐵) = 𝐴) | |
9 | 8 | reseq2d 5928 | . . 3 ⊢ (∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊 → ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵)) = ( I ↾ 𝐴)) |
10 | mptresid 5995 | . . 3 ⊢ ( I ↾ 𝐴) = (𝑛 ∈ 𝐴 ↦ 𝑛) | |
11 | 9, 10 | eqtrdi 2793 | . 2 ⊢ (∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊 → ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵)) = (𝑛 ∈ 𝐴 ↦ 𝑛)) |
12 | 7, 11 | sylan9eq 2797 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊) → ((IterComp‘𝐹)‘0) = (𝑛 ∈ 𝐴 ↦ 𝑛)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1541 ∈ wcel 2106 ∀wral 3062 Vcvv 3442 ↦ cmpt 5180 I cid 5522 dom cdm 5625 ↾ cres 5627 ‘cfv 6484 0cc0 10977 IterCompcitco 46419 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 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 2708 ax-rep 5234 ax-sep 5248 ax-nul 5255 ax-pow 5313 ax-pr 5377 ax-un 7655 ax-inf2 9503 ax-cnex 11033 ax-resscn 11034 ax-1cn 11035 ax-icn 11036 ax-addcl 11037 ax-addrcl 11038 ax-mulcl 11039 ax-mulrcl 11040 ax-mulcom 11041 ax-addass 11042 ax-mulass 11043 ax-distr 11044 ax-i2m1 11045 ax-1ne0 11046 ax-1rid 11047 ax-rnegex 11048 ax-rrecex 11049 ax-cnre 11050 ax-pre-lttri 11051 ax-pre-lttrn 11052 ax-pre-ltadd 11053 ax-pre-mulgt0 11054 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3351 df-rab 3405 df-v 3444 df-sbc 3732 df-csb 3848 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3921 df-nul 4275 df-if 4479 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4858 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5181 df-tr 5215 df-id 5523 df-eprel 5529 df-po 5537 df-so 5538 df-fr 5580 df-we 5582 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6243 df-ord 6310 df-on 6311 df-lim 6312 df-suc 6313 df-iota 6436 df-fun 6486 df-fn 6487 df-f 6488 df-f1 6489 df-fo 6490 df-f1o 6491 df-fv 6492 df-riota 7298 df-ov 7345 df-oprab 7346 df-mpo 7347 df-om 7786 df-2nd 7905 df-frecs 8172 df-wrecs 8203 df-recs 8277 df-rdg 8316 df-er 8574 df-en 8810 df-dom 8811 df-sdom 8812 df-pnf 11117 df-mnf 11118 df-xr 11119 df-ltxr 11120 df-le 11121 df-sub 11313 df-neg 11314 df-nn 12080 df-n0 12340 df-z 12426 df-uz 12689 df-seq 13828 df-itco 46421 |
This theorem is referenced by: itcovalpclem1 46432 itcovalt2lem1 46437 |
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