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| Mirrors > Home > MPE Home > Th. List > df-6 | Structured version Visualization version GIF version | ||
| Description: Define the number 6. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| df-6 | ⊢ 6 = (5 + 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c6 12425 | . 2 class 6 | |
| 2 | c5 12424 | . . 3 class 5 | |
| 3 | c1 11225 | . . 3 class 1 | |
| 4 | caddc 11227 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7440 | . 2 class (5 + 1) |
| 6 | 1, 5 | wceq 1570 | 1 wff 6 = (5 + 1) |
| Colors of variables: wff setvar class |
| This definition is used by: 6nn 12456 6re 12457 6cn 12458 6m1e5 12497 5p1e6 12513 3p3e6 12518 4p2e6 12519 5p2e7 12522 5lt6 12550 6p6e12 12917 7p6e13 12921 8p6e14 12927 8p8e16 12929 9p6e15 12934 9p7e16 12935 6t6e36 12951 7t6e42 12956 8t6e48 12962 9t6e54 12969 lt6abl 20136 ppiublem1 27556 ppiublem2 27557 ppiub 27558 bposlem8 27645 lgsdir2lem3 27681 2lgsoddprmlem3d 27767 aks4d1p1p5 43316 1p6e7 43504 rmydioph 44212 expdiophlem2 44220 ceil5half3 48619 stgoldbwt 49077 sbgoldbm 49085 |
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