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Mirrors > Home > MPE Home > Th. List > df-e | Structured version Visualization version 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 15408 | . 2 class e | |
2 | c1 10527 | . . 3 class 1 | |
3 | ce 15407 | . . 3 class exp | |
4 | 2, 3 | cfv 6324 | . 2 class (exp‘1) |
5 | 1, 4 | wceq 1538 | 1 wff e = (exp‘1) |
Colors of variables: wff setvar class |
This definition is referenced by: esum 15426 ere 15434 ege2le3 15435 efzval 15447 loge 25178 logdivlti 25211 pntpbnd1a 26169 ex-co 28223 subfaclim 32548 |
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