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| Mirrors > Home > MPE Home > Th. List > df-4 | Structured version Visualization version GIF version | ||
| Description: Define the number 4. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| df-4 | ⊢ 4 = (3 + 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c4 12185 | . 2 class 4 | |
| 2 | c3 12184 | . . 3 class 3 | |
| 3 | c1 11010 | . . 3 class 1 | |
| 4 | caddc 11012 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7349 | . 2 class (3 + 1) |
| 6 | 1, 5 | wceq 1540 | 1 wff 4 = (3 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 4nn 12211 4re 12212 4cn 12213 4pos 12235 4m1e3 12252 2p2e4 12258 3p1e4 12268 3p2e5 12274 4p4e8 12278 5p4e9 12281 3lt4 12297 6p4e10 12663 7p4e11 12667 7p7e14 12670 8p4e12 12673 8p6e14 12675 9p4e13 12680 9p5e14 12681 4t4e16 12690 5t4e20 12693 6t4e24 12697 7t4e28 12702 8t4e32 12708 9t4e36 12715 fz0to4untppr 13533 4bc2eq6 14236 bpoly3 15965 bpoly4 15966 fsumcube 15967 ef4p 16022 ef01bndlem 16093 ge2nprmge4 16612 lt6abl 19774 cphipval 25141 sincosq4sgn 26408 binom4 26758 quart1lem 26763 log2cnv 26852 ppiublem2 27112 ppiub 27113 chtub 27121 bclbnd 27189 bposlem8 27200 lgsdir2lem3 27236 3wlkdlem1 30103 ipval2 30651 problem3 35640 aks4d1p1p7 42047 rmydioph 42987 rmxdioph 42989 expdiophlem2 42995 lt4addmuld 45288 stoweidlem13 45994 m1modnep2mod 47336 4even 47693 sbgoldbo 47771 ackval40 48678 ackval41a 48679 ackval42 48681 |
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