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| Mirrors > Home > ILE Home > Th. List > dsndxnn | GIF version | ||
| Description: The index of the slot for the distance in an extensible structure is a positive integer. (Contributed by AV, 28-Oct-2024.) |
| Ref | Expression |
|---|---|
| dsndxnn | ⊢ (dist‘ndx) ∈ ℕ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dsndx 13117 | . 2 ⊢ (dist‘ndx) = ;12 | |
| 2 | 1nn0 9326 | . . 3 ⊢ 1 ∈ ℕ0 | |
| 3 | 2nn 9213 | . . 3 ⊢ 2 ∈ ℕ | |
| 4 | 2, 3 | decnncl 9538 | . 2 ⊢ ;12 ∈ ℕ |
| 5 | 1, 4 | eqeltri 2279 | 1 ⊢ (dist‘ndx) ∈ ℕ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2177 ‘cfv 5279 1c1 7941 ℕcn 9051 2c2 9102 ;cdc 9519 ndxcnx 12899 distcds 12988 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4169 ax-pow 4225 ax-pr 4260 ax-un 4487 ax-setind 4592 ax-cnex 8031 ax-resscn 8032 ax-1cn 8033 ax-1re 8034 ax-icn 8035 ax-addcl 8036 ax-addrcl 8037 ax-mulcl 8038 ax-addcom 8040 ax-mulcom 8041 ax-addass 8042 ax-mulass 8043 ax-distr 8044 ax-i2m1 8045 ax-1rid 8047 ax-0id 8048 ax-rnegex 8049 ax-cnre 8051 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-ral 2490 df-rex 2491 df-reu 2492 df-rab 2494 df-v 2775 df-sbc 3003 df-dif 3172 df-un 3174 df-in 3176 df-ss 3183 df-pw 3622 df-sn 3643 df-pr 3644 df-op 3646 df-uni 3856 df-int 3891 df-br 4051 df-opab 4113 df-mpt 4114 df-id 4347 df-xp 4688 df-rel 4689 df-cnv 4690 df-co 4691 df-dm 4692 df-rn 4693 df-res 4694 df-iota 5240 df-fun 5281 df-fv 5287 df-riota 5911 df-ov 5959 df-oprab 5960 df-mpo 5961 df-sub 8260 df-inn 9052 df-2 9110 df-3 9111 df-4 9112 df-5 9113 df-6 9114 df-7 9115 df-8 9116 df-9 9117 df-n0 9311 df-dec 9520 df-ndx 12905 df-slot 12906 df-ds 13001 |
| This theorem is referenced by: prdsex 13171 prdsval 13175 |
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