williamstein

~$ python
Python 2.7.6 (default, Mar 22 2014, 22:59:56)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import regs_180k_200k_conca
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "regs_180k_200k_conca.py", line 5484
 
 

williamstein

###################################################################
#
# Code to support simultaneous multiple editing
# sessions by different clients of a single object.  This uses
# the Differential Synchronization algorithm of Neil Fraser,
# which is the same thing that Google Docs uses.
#
#   * "Differential Synchronization" (by Neil Fraser).
#   * http://neil.fraser.name/writing/sync/
#   * http://www.youtube.com/watch?v=S2Hp_1jqpY8

williamstein

def f(n):
    return n * n

williamstein

def foo(n):
    return n*n + 1

williamstein

def f(n):
    return n * n

williamstein

#!/usr/bin/python
 
import os, sys
argv = sys.argv
 
if len(argv) < 4:
    print "*********\nThis is the replace command, by William Stein (was@math.harvard.edu)\n*********"
    print "\tUsage: %s [-f] <from> <to> [file 1] [file 2] ..."%argv[0]
    print "Optional argument -f is to not ask for confirmation.";
    sys.exit(0)

williamstein

def tofile(s):
    maxout=500
    import uuid
    filename = str(uuid.uuid4()) +'.log'
    o = open(filename,'w')

    stdout = sys.stdout
    class Stdout:
        def __init__(self):
            self.t = 0

williamstein

###############################################################################
# Copyright (c) 2013, William Stein
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,

williamstein

%time

filename_pattern = '/tmp/plt-%04d.png'

@parallel
def frame(n, filename):
    t = Tachyon(xres=800,yres=800, camera_center=(2,5,2), look_at=(2.5,0,0), antialiasing=True)
    t.light((0,0,100), 1, (1,1,1))
    t.texture('r', ambient=0.1, diffuse=0.9, specular=0.5, opacity=1.0, color=(1,0,0))
    for i in range(n):

williamstein

# SageMath Cloud backend architecture talk at Sage Days 56

## Guiding principles

 - A place for everybody to use *all* math-related software easily, especially (but not only!) open source

 - High availability: automatically survive failure of any proper subset of datacenters

 - Make it very hard to permanently lose work:
     - everything has synchronization