3 ms·
The algorithm (version 2, there are newer versions too). https://www.supermemo.com/english/ol/sm2.htm https://www.supermemo.com/english/ol/sm2.htm
by ajuc 8y ago
The algorithm (version 2, there are newer versions too).
https://www.supermemo.com/english/ol/sm2.htm https://www.supermemo.com/english/ol/sm2.htm