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| Mirrors > Home > ILE Home > Th. List > plendxnn | GIF version | ||
| Description: The index value of the order slot is a positive integer. This property should be ensured for every concrete coding because otherwise it could not be used in an extensible structure (slots must be positive integers). (Contributed by AV, 30-Oct-2024.) |
| Ref | Expression |
|---|---|
| plendxnn | ⊢ (le‘ndx) ∈ ℕ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | plendx 13531 | . 2 ⊢ (le‘ndx) = ;10 | |
| 2 | 10nn 9771 | . 2 ⊢ ;10 ∈ ℕ | |
| 3 | 1, 2 | eqeltri 2311 | 1 ⊢ (le‘ndx) ∈ ℕ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2209 ‘cfv 5372 0cc0 8169 1c1 8170 ℕcn 9283 ;cdc 9756 ndxcnx 13327 lecple 13415 |
| 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-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-cnex 8260 ax-resscn 8261 ax-1cn 8262 ax-1re 8263 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-mulcom 8270 ax-addass 8271 ax-mulass 8272 ax-distr 8273 ax-1rid 8276 ax-0id 8277 ax-cnre 8280 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-int 3966 df-br 4126 df-opab 4188 df-mpt 4189 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-rn 4780 df-res 4781 df-iota 5332 df-fun 5374 df-fv 5380 df-ov 6078 df-inn 9284 df-2 9342 df-3 9343 df-4 9344 df-5 9345 df-6 9346 df-7 9347 df-8 9348 df-9 9349 df-dec 9757 df-ndx 13333 df-slot 13334 df-ple 13428 |
| This theorem is referenced by: prdsex 14149 prdsval 14150 znval 14943 znbaslemnn 14946 |
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