| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > pinn | GIF version | ||
| Description: A positive integer is a natural number. (Contributed by NM, 15-Aug-1995.) |
| Ref | Expression |
|---|---|
| pinn | ⊢ (𝐴 ∈ N → 𝐴 ∈ ω) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ni 7619 | . . 3 ⊢ N = (ω ∖ {∅}) | |
| 2 | difss 3345 | . . 3 ⊢ (ω ∖ {∅}) ⊆ ω | |
| 3 | 1, 2 | eqsstri 3270 | . 2 ⊢ N ⊆ ω |
| 4 | 3 | sseli 3234 | 1 ⊢ (𝐴 ∈ N → 𝐴 ∈ ω) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2203 ∖ cdif 3208 ∅c0 3508 {csn 3689 ωcom 4712 Ncnpi 7587 |
| 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-in1 619 ax-in2 620 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 2815 df-dif 3213 df-in 3217 df-ss 3224 df-ni 7619 |
| This theorem is referenced by: pion 7625 piord 7626 elni2 7629 mulidpi 7633 ltsopi 7635 pitric 7636 pitri3or 7637 ltdcpi 7638 addclpi 7642 mulclpi 7643 addcompig 7644 addasspig 7645 mulcompig 7646 mulasspig 7647 distrpig 7648 addcanpig 7649 mulcanpig 7650 addnidpig 7651 ltexpi 7652 ltapig 7653 ltmpig 7654 nnppipi 7658 enqdc 7676 archnqq 7732 prarloclemarch2 7734 enq0enq 7746 enq0sym 7747 enq0ref 7748 enq0tr 7749 nqnq0pi 7753 nqnq0 7756 addcmpblnq0 7758 mulcmpblnq0 7759 mulcanenq0ec 7760 addclnq0 7766 nqpnq0nq 7768 nqnq0a 7769 nqnq0m 7770 nq0m0r 7771 nq0a0 7772 nnanq0 7773 distrnq0 7774 mulcomnq0 7775 addassnq0lemcl 7776 addassnq0 7777 nq02m 7780 prarloclemlt 7808 prarloclemn 7814 |
| Copyright terms: Public domain | W3C validator |