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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-ndxarg | Structured version Visualization version GIF version | ||
| Description: Proof of ndxarg 17166 from bj-evalid 37064. (Contributed by BJ, 27-Dec-2021.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| bj-ndxarg.1 | ⊢ 𝐸 = Slot 𝑁 |
| bj-ndxarg.2 | ⊢ 𝑁 ∈ ℕ |
| Ref | Expression |
|---|---|
| bj-ndxarg | ⊢ (𝐸‘ndx) = 𝑁 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnex 12192 | . 2 ⊢ ℕ ∈ V | |
| 2 | bj-ndxarg.2 | . 2 ⊢ 𝑁 ∈ ℕ | |
| 3 | bj-ndxarg.1 | . . . 4 ⊢ 𝐸 = Slot 𝑁 | |
| 4 | df-ndx 17164 | . . . 4 ⊢ ndx = ( I ↾ ℕ) | |
| 5 | 3, 4 | fveq12i 6864 | . . 3 ⊢ (𝐸‘ndx) = (Slot 𝑁‘( I ↾ ℕ)) |
| 6 | bj-evalid 37064 | . . 3 ⊢ ((ℕ ∈ V ∧ 𝑁 ∈ ℕ) → (Slot 𝑁‘( I ↾ ℕ)) = 𝑁) | |
| 7 | 5, 6 | eqtrid 2776 | . 2 ⊢ ((ℕ ∈ V ∧ 𝑁 ∈ ℕ) → (𝐸‘ndx) = 𝑁) |
| 8 | 1, 2, 7 | mp2an 692 | 1 ⊢ (𝐸‘ndx) = 𝑁 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1540 ∈ wcel 2109 Vcvv 3447 I cid 5532 ↾ cres 5640 ‘cfv 6511 ℕcn 12186 Slot cslot 17151 ndxcnx 17163 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-1cn 11126 ax-addcl 11128 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-ov 7390 df-om 7843 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-nn 12187 df-slot 17152 df-ndx 17164 |
| This theorem is referenced by: (None) |
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