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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 13346 | . 2 ⊢ (le‘ndx) = ;10 | |
| 2 | 10nn 9670 | . 2 ⊢ ;10 ∈ ℕ | |
| 3 | 1, 2 | eqeltri 2304 | 1 ⊢ (le‘ndx) ∈ ℕ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 ‘cfv 5333 0cc0 8075 1c1 8076 ℕcn 9185 ;cdc 9655 ndxcnx 13142 lecple 13230 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-mulcom 8176 ax-addass 8177 ax-mulass 8178 ax-distr 8179 ax-1rid 8182 ax-0id 8183 ax-cnre 8186 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-sbc 3033 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-iota 5293 df-fun 5335 df-fv 5341 df-ov 6031 df-inn 9186 df-2 9244 df-3 9245 df-4 9246 df-5 9247 df-6 9248 df-7 9249 df-8 9250 df-9 9251 df-dec 9656 df-ndx 13148 df-slot 13149 df-ple 13243 |
| This theorem is referenced by: prdsex 13415 prdsval 13419 znval 14715 znbaslemnn 14718 |
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