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Mirrors > Home > ILE Home > Th. List > ltrelpi | GIF version |
Description: Positive integer 'less than' is a relation on positive integers. (Contributed by NM, 8-Feb-1996.) |
Ref | Expression |
---|---|
ltrelpi | ⊢ <N ⊆ (N × N) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-lti 7239 | . 2 ⊢ <N = ( E ∩ (N × N)) | |
2 | inss2 3338 | . 2 ⊢ ( E ∩ (N × N)) ⊆ (N × N) | |
3 | 1, 2 | eqsstri 3169 | 1 ⊢ <N ⊆ (N × N) |
Colors of variables: wff set class |
Syntax hints: ∩ cin 3110 ⊆ wss 3111 E cep 4259 × cxp 4596 Ncnpi 7204 <N clti 7207 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-v 2723 df-in 3117 df-ss 3124 df-lti 7239 |
This theorem is referenced by: ltsonq 7330 caucvgprlemk 7597 caucvgprlem1 7611 caucvgprlem2 7612 caucvgprprlemk 7615 caucvgprprlemval 7620 caucvgprprlem1 7641 caucvgprprlem2 7642 ltrenn 7787 |
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