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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 7163 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (𝑛 ∈ 𝐴 ↦ 𝐵) ∈ V) | |
| 5 | itcoval0 48790 | . . . 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 2780 | . 2 ⊢ (𝐴 ∈ 𝑉 → ((IterComp‘𝐹)‘0) = ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵))) |
| 8 | dmmptg 6196 | . . . 4 ⊢ (∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊 → dom (𝑛 ∈ 𝐴 ↦ 𝐵) = 𝐴) | |
| 9 | 8 | reseq2d 5934 | . . 3 ⊢ (∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊 → ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵)) = ( I ↾ 𝐴)) |
| 10 | mptresid 6006 | . . 3 ⊢ ( I ↾ 𝐴) = (𝑛 ∈ 𝐴 ↦ 𝑛) | |
| 11 | 9, 10 | eqtrdi 2784 | . 2 ⊢ (∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊 → ( I ↾ dom (𝑛 ∈ 𝐴 ↦ 𝐵)) = (𝑛 ∈ 𝐴 ↦ 𝑛)) |
| 12 | 7, 11 | sylan9eq 2788 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑛 ∈ 𝐴 𝐵 ∈ 𝑊) → ((IterComp‘𝐹)‘0) = (𝑛 ∈ 𝐴 ↦ 𝑛)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ∀wral 3048 Vcvv 3437 ↦ cmpt 5176 I cid 5515 dom cdm 5621 ↾ cres 5623 ‘cfv 6488 0cc0 11015 IterCompcitco 48785 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 ax-inf2 9540 ax-cnex 11071 ax-resscn 11072 ax-1cn 11073 ax-icn 11074 ax-addcl 11075 ax-addrcl 11076 ax-mulcl 11077 ax-mulrcl 11078 ax-mulcom 11079 ax-addass 11080 ax-mulass 11081 ax-distr 11082 ax-i2m1 11083 ax-1ne0 11084 ax-1rid 11085 ax-rnegex 11086 ax-rrecex 11087 ax-cnre 11088 ax-pre-lttri 11089 ax-pre-lttrn 11090 ax-pre-ltadd 11091 ax-pre-mulgt0 11092 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-om 7805 df-2nd 7930 df-frecs 8219 df-wrecs 8250 df-recs 8299 df-rdg 8337 df-er 8630 df-en 8878 df-dom 8879 df-sdom 8880 df-pnf 11157 df-mnf 11158 df-xr 11159 df-ltxr 11160 df-le 11161 df-sub 11355 df-neg 11356 df-nn 12135 df-n0 12391 df-z 12478 df-uz 12741 df-seq 13913 df-itco 48787 |
| This theorem is referenced by: itcovalpclem1 48798 itcovalt2lem1 48803 |
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