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Metamath Proof Explorer
Definition df-e
Description: Define Euler's constant _e = 2.71828.... (Contributed by NM, 14-Mar-2005)
|
|
Ref |
Expression |
|
Assertion |
df-e |
⊢ e = ( exp ‘ 1 ) |
Detailed syntax breakdown
| Step |
Hyp |
Ref |
Expression |
| 0 |
|
ceu |
⊢ e |
| 1 |
|
ce |
⊢ exp |
| 2 |
|
c1 |
⊢ 1 |
| 3 |
2 1
|
cfv |
⊢ ( exp ‘ 1 ) |
| 4 |
0 3
|
wceq |
⊢ e = ( exp ‘ 1 ) |