TROUBLE China sign in ask.sagemath by google /yahoo/openid
google /yahoo/openid all locked by China GREAT WAREFIRE,
yahoo only can see mainsite,cannot rigster email from China.
gmail (including google.com,and anythings about google)was locked about 2 months,from 6.4.2014.
openid cannot open always in China.
China is Changing to stupid North koera
ther are 4 biggest internet ISP in China,3 have locked google and all forgien College and University.
so better ask.sagemath can add more rigster method.no only google /yahoo/openid,I write this by VPN.but 99/100 VPN was locked from 6.4.2014.