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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 9313 | . 2 ⊢ 2 = (1 + 1) | |
| 2 | 1 | eqcomi 2238 | 1 ⊢ (1 + 1) = 2 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6058 1c1 8144 + caddc 8146 2c2 9305 |
| 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 1496 ax-gen 1498 ax-ext 2216 |
| This theorem depends on definitions: df-bi 117 df-cleq 2227 df-2 9313 |
| This theorem is referenced by: 2m1e1 9372 add1p1 9505 sub1m1 9506 nn0n0n1ge2 9665 3halfnz 9693 10p10e20 9821 5t4e20 9828 6t4e24 9832 7t3e21 9836 8t3e24 9842 9t3e27 9849 fz0to3un2pr 10479 fldiv4p1lem1div2 10689 m1modge3gt1 10757 fac2 11118 hash2 11202 s2leng 11506 nn0o1gt2 12616 3lcm2e6woprm 12808 2exp8 13158 2exp11 13159 2exp16 13160 ballotfilem2 13172 ballotfilemfc0 13176 ballotfilemfcc 13177 logbleb 15952 logblt 15953 1sgm2ppw 15989 1loopgrvd2fi 16426 2wlklem 16497 clwwlkext2edg 16543 konigsberglem1 16609 konigsberglem2 16610 konigsberglem3 16611 ex-exp 16621 |
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