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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 12676 | . 2 ⊢ (le‘ndx) = ;10 | |
2 | 10nn 9416 | . 2 ⊢ ;10 ∈ ℕ | |
3 | 1, 2 | eqeltri 2261 | 1 ⊢ (le‘ndx) ∈ ℕ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2159 ‘cfv 5230 0cc0 7828 1c1 7829 ℕcn 8936 ;cdc 9401 ndxcnx 12476 lecple 12561 |
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 710 ax-5 1457 ax-7 1458 ax-gen 1459 ax-ie1 1503 ax-ie2 1504 ax-8 1514 ax-10 1515 ax-11 1516 ax-i12 1517 ax-bndl 1519 ax-4 1520 ax-17 1536 ax-i9 1540 ax-ial 1544 ax-i5r 1545 ax-13 2161 ax-14 2162 ax-ext 2170 ax-sep 4135 ax-pow 4188 ax-pr 4223 ax-un 4447 ax-cnex 7919 ax-resscn 7920 ax-1cn 7921 ax-1re 7922 ax-icn 7923 ax-addcl 7924 ax-addrcl 7925 ax-mulcl 7926 ax-mulcom 7929 ax-addass 7930 ax-mulass 7931 ax-distr 7932 ax-1rid 7935 ax-0id 7936 ax-cnre 7939 |
This theorem depends on definitions: df-bi 117 df-3an 981 df-tru 1366 df-nf 1471 df-sb 1773 df-eu 2040 df-mo 2041 df-clab 2175 df-cleq 2181 df-clel 2184 df-nfc 2320 df-ral 2472 df-rex 2473 df-rab 2476 df-v 2753 df-sbc 2977 df-un 3147 df-in 3149 df-ss 3156 df-pw 3591 df-sn 3612 df-pr 3613 df-op 3615 df-uni 3824 df-int 3859 df-br 4018 df-opab 4079 df-mpt 4080 df-id 4307 df-xp 4646 df-rel 4647 df-cnv 4648 df-co 4649 df-dm 4650 df-rn 4651 df-res 4652 df-iota 5192 df-fun 5232 df-fv 5238 df-ov 5893 df-inn 8937 df-2 8995 df-3 8996 df-4 8997 df-5 8998 df-6 8999 df-7 9000 df-8 9001 df-9 9002 df-dec 9402 df-ndx 12482 df-slot 12483 df-ple 12574 |
This theorem is referenced by: prdsex 12739 |
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