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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 7618 | . 2 ⊢ <N = ( E ∩ (N × N)) | |
| 2 | inss2 3441 | . 2 ⊢ ( E ∩ (N × N)) ⊆ (N × N) | |
| 3 | 1, 2 | eqsstri 3269 | 1 ⊢ <N ⊆ (N × N) |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3209 ⊆ wss 3210 E cep 4407 × cxp 4746 Ncnpi 7583 <N clti 7586 |
| 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-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2814 df-in 3216 df-ss 3223 df-lti 7618 |
| This theorem is referenced by: ltsonq 7709 caucvgprlemk 7976 caucvgprlem1 7990 caucvgprlem2 7991 caucvgprprlemk 7994 caucvgprprlemval 7999 caucvgprprlem1 8020 caucvgprprlem2 8021 ltrenn 8166 |
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