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Mirrors > Home > ILE Home > Th. List > 4nn | Unicode version |
Description: 4 is a positive integer. (Contributed by NM, 8-Jan-2006.) |
Ref | Expression |
---|---|
4nn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-4 8774 | . 2 | |
2 | 3nn 8875 | . . 3 | |
3 | peano2nn 8725 | . . 3 | |
4 | 2, 3 | ax-mp 5 | . 2 |
5 | 1, 4 | eqeltri 2210 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 (class class class)co 5767 c1 7614 caddc 7616 cn 8713 c3 8765 c4 8766 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-cnex 7704 ax-resscn 7705 ax-1re 7707 ax-addrcl 7710 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-int 3767 df-br 3925 df-iota 5083 df-fv 5126 df-ov 5770 df-inn 8714 df-2 8772 df-3 8773 df-4 8774 |
This theorem is referenced by: 5nn 8877 4nn0 8989 4z 9077 fldiv4p1lem1div2 10071 iexpcyc 10390 resqrexlemnmsq 10782 ef01bndlem 11452 flodddiv4 11620 flodddiv4t2lthalf 11623 6lcm4e12 11757 starvndx 12067 starvid 12068 starvslid 12069 srngstrd 12070 dveflem 12844 tan4thpi 12911 |
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