One way to check that a vector is an eigenvector is to simply apply the matrix transformation and see if this is the same as multiplying by a scalar. A

# How to renew your LetsEncrypt certificate

sudo service nginx stop

letsencrypt renew –email your-email-address –agree-tos

sudo service nginx start

That is it. Bingo!

# Max Increase to Keep City Skyline

In a 2 dimensional array `grid`

, each value `grid[i][j]`

represents the height of a building located there. We are allowed to increase the height of any number of buildings, by any amount (the amounts can be different for different buildings). Height 0 is considered to be a building as well.

At the end, the “skyline” when viewed from all four directions of the grid, i.e. top, bottom, left, and right, must be the same as the skyline of the original grid. A city’s skyline is the outer contour of the rectangles formed by all the buildings when viewed from a distance. See the following example.

What is the maximum total sum that the height of the buildings can be increased?

Example:Input:grid = [[3,0,8,4],[2,4,5,7],[9,2,6,3],[0,3,1,0]]Output:35Explanation:The grid is: [ [3, 0, 8, 4], [2, 4, 5, 7], [9, 2, 6, 3], [0, 3, 1, 0] ] The skyline viewed from top or bottom is: [9, 4, 8, 7] The skyline viewed from left or right is: [8, 7, 9, 3] The grid after increasing the height of buildings without affecting skylines is: gridNew = [ [8, 4, 8, 7], [7, 4, 7, 7], [9, 4, 8, 7], [3, 3, 3, 3] ]

**Notes:**

`1 < grid.length = grid[0].length <= 50`

.- All heights
`grid[i][j]`

are in the range`[0, 100]`

. - All buildings in
`grid[i][j]`

occupy the entire grid cell: that is, they are a`1 x 1 x grid[i][j]`

rectangular prism.

class Solution: def maxIncreaseKeepingSkyline(self, grid: List[List[int]]) -> int: lr_view = [max(line) for line in grid] tb_view = [max(line) for line in zip(*grid)] result = 0 for i in range(len(grid)): for j in range(len(grid[0])): diff = min(tb_view[j], lr_view[i]) - grid[i][j] result += max(0, diff) return result

# Wave Function Collapse

# Our project finally!

# ESIM

# Decomposable Attention

### Quote

Some people can read War and Peace and come away thinking it’s a simple adventure story. Others can read the ingredients on a chewing gum wrapper and unlock the secrets of the universe.

Lex Luthor

# The revolution of CNN

(a) Regular convolution：**AlexNet/VGG**

(b) Separable convolution block：

Split **Regular convolution** into **Depth wise** and **Point wise**.

(c) Separable with linear bottleneck：Import **ResNet bottleneck** into **Separable convolution**.

(d) bottleneck with expansion layer：

Invert **bottleneck**. (Small – Large – Small)