added e

data/Basic_constants/E/collection.yaml

@@ -0,0 +1,46 @@
+ID: INPUT{id.yaml} 
+
+Title: E
+
+Definition: >
+  Euler's constant $e$ can be defined as the unique positive real number
+  such that $e^x$ equals its own derivative.
+  
+Parameters:
+
+Comments: 
+
+Formulas: 
+- >
+  $e = \sum_{n\geq 0} 1/n!$.
+- >
+  $e = \lim_{n\to\infty} (1+1/n)^n$.
+- >
+  $\int_1^e 1/x\, dx = 1$.
+
+Programs: 
+- language: Sage
+  code: |
+    numbers = [RBF(e)]
+
+References:
+
+Links:
+  Wiki:
+    title: "Wikipedia: e"
+    url: https://en.wikipedia.org/wiki/E
+
+Similar tables:
+
+Keywords: |
+  
+Tags: |
+  transcendental
+  irrational
+  exponential function  
+
+Data properties:
+  type: RB
+
+Numbers:
+- 2.718281828459045235360287471352662497757247093699959574966967627724076630353547594571382178525166427427466391932003059921817413596629043572900334295260595630738132328627943490763233829880753195251019011573834187930702154089149934884167509244761460668082264800168477411853742345442437107539077744992069 +/- 1e-300