ON THE HISTORY OF THE CATEGORY OF" OVADIN DE'CHOL" PROHIBITIONS ON THE SABBATH AND YOM- TOV AND ITS RELATIONSHIP TO THE CATEGORY OF" SHEVUT" PROHIBITIONS

Ramat Gan, Israel

ADMIEL KOSMAN

Department of Talmud

Ph.D. Thesis

Submitted to the Senate of Bar- Ilan University

February, 1993