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| Mirrors > Home > ILE Home > Th. List > 1p1e2 | GIF version | ||
| Description: 1 + 1 = 2. (Contributed by NM, 1-Apr-2008.) |
| Ref | Expression |
|---|---|
| 1p1e2 | ⊢ (1 + 1) = 2 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-2 9342 | . 2 ⊢ 2 = (1 + 1) | |
| 2 | 1 | eqcomi 2242 | 1 ⊢ (1 + 1) = 2 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 (class class class)co 6075 1c1 8170 + caddc 8172 2c2 9334 |
| 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-5 1500 ax-gen 1502 ax-ext 2220 |
| This theorem depends on definitions: df-bi 117 df-cleq 2231 df-2 9342 |
| This theorem is referenced by: 2m1e1 9401 add1p1 9534 sub1m1 9535 nn0n0n1ge2 9694 3halfnz 9722 10p10e20 9850 5t4e20 9857 6t4e24 9861 7t3e21 9865 8t3e24 9871 9t3e27 9878 fz0to3un2pr 10508 fldiv4p1lem1div2 10718 m1modge3gt1 10786 fac2 11147 hash2 11231 s2leng 11539 nn0o1gt2 12650 3lcm2e6woprm 12842 2exp8 13192 2exp11 13193 2exp16 13194 ballotfilem2 13206 ballotfilemfc0 13210 ballotfilemfcc 13211 logfac 15918 logbleb 15986 logblt 15987 1sgm2ppw 16023 1loopgrvd2fi 16460 2wlklem 16531 clwwlkext2edg 16577 konigsberglem1 16643 konigsberglem2 16644 konigsberglem3 16645 ex-exp 16655 |
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