junzis

# https://stackoverflow.com/questions/25191620/
#   creating-lowpass-filter-in-scipy-understanding-methods-and-units

import numpy as np
from scipy.signal import butter, lfilter, freqz
from matplotlib import pyplot as plt


def butter_lowpass(cutoff, fs, order=5):
    nyq = 0.5 * fs

dannycastonguay

Installing Arch Linux on VirtualBox in Windows 10

I recently upgraded to a new system, and instead of running Arch Linux natively I've decided to run it inside VirtualBox on Windows 10. Below I note down the steps I took, which closely follow the excellent wiki pages of archlinux. But along the way, I also noted a few other steps steps I took to make this system very comfortable, which you'll have to figure out for yourself if you like them or not!

Setting up Windows 10 to be ready

There isn't much of preparation required, given that I started from scratch, but I did have to setup my windows environment a little bit.

1. Install the windows package manager chocolatey
2. Install qBittorrent (which will be used to download an iso copy of arch) by running the following command from the command line choco install qbittorrent (recommended to run the command line as an adm

bishboria

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

awjuliani

bramblex

#!/bin/bash

function __main__(){
    BACKUP_DIR=${HOME}/.autobackup
    local op=${1}
    shift

    case ${op} in
        "init")
            init ${@}

dongweiming

#/usr/bin/env python
# coding=utf-8

import random
import re


def color(messages):
    color = '\x1B[%d;%dm' % (1,random.randint(30,37))
    return '%s %s\x1B[0m' % (color,messages)