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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-ndxarg | Structured version Visualization version GIF version | ||
| Description: Proof of ndxarg 17262 from bj-evalid 37746. (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 12245 | . 2 ⊢ ℕ ∈ V | |
| 2 | bj-ndxarg.2 | . 2 ⊢ 𝑁 ∈ ℕ | |
| 3 | bj-ndxarg.1 | . . . 4 ⊢ 𝐸 = Slot 𝑁 | |
| 4 | df-ndx 17260 | . . . 4 ⊢ ndx = ( I ↾ ℕ) | |
| 5 | 3, 4 | fveq12i 6887 | . . 3 ⊢ (𝐸‘ndx) = (Slot 𝑁‘( I ↾ ℕ)) |
| 6 | bj-evalid 37746 | . . 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 704 | 1 ⊢ (𝐸‘ndx) = 𝑁 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 400 = wceq 1569 ∈ wcel 2142 Vcvv 3454 I cid 5554 ↾ cres 5662 ‘cfv 6536 ℕcn 12239 Slot cslot 17247 ndxcnx 17259 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-1cn 11164 ax-addcl 11166 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 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 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7415 df-om 7861 df-2nd 7985 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-nn 12240 df-slot 17248 df-ndx 17260 |
| This theorem is used by: (None) |
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