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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-ndxarg | Structured version Visualization version GIF version | ||
| Description: Proof of ndxarg 17292 from bj-evalid 37813. (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 12266 | . 2 ⊢ ℕ ∈ V | |
| 2 | bj-ndxarg.2 | . 2 ⊢ 𝑁 ∈ ℕ | |
| 3 | bj-ndxarg.1 | . . . 4 ⊢ 𝐸 = Slot 𝑁 | |
| 4 | df-ndx 17290 | . . . 4 ⊢ ndx = ( I ↾ ℕ) | |
| 5 | 3, 4 | fveq12i 6888 | . . 3 ⊢ (𝐸‘ndx) = (Slot 𝑁‘( I ↾ ℕ)) |
| 6 | bj-evalid 37813 | . . 3 ⊢ ((ℕ ∈ V ∧ 𝑁 ∈ ℕ) → (Slot 𝑁‘( I ↾ ℕ)) = 𝑁) | |
| 7 | 5, 6 | eqtrid 2809 | . 2 ⊢ ((ℕ ∈ V ∧ 𝑁 ∈ ℕ) → (𝐸‘ndx) = 𝑁) |
| 8 | 1, 2, 7 | mp2an 705 | 1 ⊢ (𝐸‘ndx) = 𝑁 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2145 Vcvv 3453 I cid 5553 ↾ cres 5661 ‘cfv 6537 ℕcn 12260 Slot cslot 17277 ndxcnx 17289 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-cnex 11183 ax-1cn 11185 ax-addcl 11187 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7419 df-om 7866 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-nn 12261 df-slot 17278 df-ndx 17290 |
| This theorem is used by: (None) |
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