by kirtu » Mon Dec 27, 2010 10:18 pm
Tibetan Calendar Mathematics by Svante Janson.
The "mathematics" is just simple modular arithmetic. And actually the paper isn't presented using traditional calculations so it's unclear if the Tibetans used modular arithmetic directly or not (it's hinted that they just used rule systems) although they did and do use astronomical data.from observations to track lunar and solar motion and determine if particular points in the sky have been passed, etc.
Kirt
"Set your heart on virtue: Virtue's outcome is delight".
Dharmapada 9:3
“All beings are Buddhas, but obscured by incidental stains. When those have been removed, there is Buddhahood.”
Hevajra Tantra