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Mirrors > Home > ILE Home > Th. List > df-e | GIF version |
Description: Define Euler's constant e = 2.71828.... (Contributed by NM, 14-Mar-2005.) |
Ref | Expression |
---|---|
df-e | ⊢ e = (exp‘1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ceu 11540 | . 2 class e | |
2 | c1 7733 | . . 3 class 1 | |
3 | ce 11539 | . . 3 class exp | |
4 | 2, 3 | cfv 5170 | . 2 class (exp‘1) |
5 | 1, 4 | wceq 1335 | 1 wff e = (exp‘1) |
Colors of variables: wff set class |
This definition is referenced by: esum 11559 ere 11567 ege2le3 11568 efzval 11580 reeff1oleme 13104 loge 13199 logdivlti 13213 |
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