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Mirrors > Home > ILE Home > Th. List > df-2 | Unicode version |
Description: Define the number 2. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
df-2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c2 8929 | . 2 | |
2 | c1 7775 | . . 3 | |
3 | caddc 7777 | . . 3 | |
4 | 2, 2, 3 | co 5853 | . 2 |
5 | 1, 4 | wceq 1348 | 1 |
Colors of variables: wff set class |
This definition is referenced by: 2re 8948 0le2 8968 2pos 8969 1p1e2 8995 2p2e4 9005 2times 9006 3p2e5 9019 4p2e6 9021 5p2e7 9024 6p2e8 9027 7p2e9 9029 2nn 9039 1lt2 9047 nneoor 9314 6p6e12 9416 7p5e12 9419 8p2e10 9422 8p4e12 9424 9p2e11 9429 9p3e12 9430 5t2e10 9442 eluz2b1 9560 nn01to3 9576 fztp 10034 fzprval 10038 fztpval 10039 fzo12sn 10173 rebtwn2zlemstep 10209 rebtwn2z 10211 sqval 10534 fac2 10665 bcp1m1 10699 hashprg 10743 binom11 11449 ege2le3 11634 ef4p 11657 efgt1p2 11658 eirraplem 11739 odd2np1lem 11831 opoe 11854 ncoprmgcdne1b 12043 isprm3 12072 prmind2 12074 dvdsnprmd 12079 prmgt1 12086 pockthlem 12308 pockthg 12309 prmunb 12314 dveflem 13481 coskpi 13563 lgslem1 13695 lgsval2lem 13705 lgsdir2lem2 13724 lgsdir2lem3 13725 lgsdirprm 13729 ex-fl 13760 |
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