I want to know the answer to the following question:
Who wrote the first 12 chapters of the Siddhanta Shiromani?
All the background I'm provided with is that "According to Sarma (2008): "One finds in the Rigveda intelligent speculations about the genesis of the universe from nonexistence, the configuration of the universe, the spherical self-supporting earth, and the year of 360 days divided into 12 equal parts of 30 days each with a periodical intercalary month.".". Is that enough to answer the question?
Answer: no