R.Yitzchak b.Yosef of Corbeil was a student
and son-in-law of R.Yechiel of Paris. His book
Amudei Golah, also known as the Sefer Mitzvos
Katan (abbreviated "SEMAK"), gave a concise
treatment of the mitzvos that are currently
in effect. It was divided into seven sections
so it could be read through in seven days. He
composed it in 1277 and sent copies to many
communities, encouraging them to disseminate
it. He passed away in 1280.
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