Numpy Constants

## Description

NumPy has several constants we can make use of:

`numpy.PINF`: a floating point representation of positive infinity`numpy.NINF`: a floating point representation of negative infinity`numpy.e`: Euler's constant`numpy.euler_gamma`: Euler's gamma constant`numpy.pi`: Pi.

While age has built in constants for pi, infinity and e, it is better to use the NumPy constants when writing cells in NumPy, as certaint NumPy functions such as `numpy.isinf` do not function with sage constants.

## Sage Cell

#### Code

```
import numpy as np
print np.PINF
print np.NINF
print np.e
print np.euler_gamma
print np.pi
```

## Options

none

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Date: 06 Apr 2019 18:41

Submitted by: Zane Corbiere