First

Second

\( y = x²\)

\(H ( Y | X ) = \sum _ { x \in \mathcal { X } , y \in \mathcal { Y } } p ( x , y ) \log \left( \frac { p ( x ) } { p ( x , y ) } \right)\)

First

Second

\( y = x²\)

Third

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Originally published at gist.github.com.

# 1

$3^{1}$

# 2

```swift

var threeDoubles = Array(repeating: 0.0, count: 3)
print(threeDoubles.popLast() ?? nil!) //0.0
// threeDoubles is of type [Double], and equals [0.0, 0.0, 0.0]

```

Start of Something New is a song from the movie High School Musical, I love it , especially for the lyrics. I’ve been learning English for more than 17 years, but never write any articles about my true feelings in English. That is not strange for me, because I don’t even write any in my mother language…