User:הסרפד/Joseph ben Abraham

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Two passages in the standard edition of the Mordechai, an important halakhic text by Mordechai ben Hillel (died 1298), refer to Rabbi Yehiel of Paris as the author's father-in-law; a third refers to Isaac of Corbeil, known to be Yehiel's son-in-law, as the author's brother-in-law. As a result, the common view (held by Ibn Yahya, Conforte, Azulai and others) was that Mordechai wrote these passages and thus was Yehiel's son-in-law.

In the course of his research on the Mordechai, Samuel Kohn found that none of the manuscript versions he examined contained these passages, and concluded that they were originally glosses that had been incorrectly interpolated in the text.

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Urbach suggested that the author of the comments was a previously unknown son-in-law of Yehiel. In 1967, Bialer, in his description of the Sir Isaac Wolfson Collection, described a manuscript of the Mordechai which identifies the author of the anonymous "father-in-law" comments of the other versions as his master, Rabbi Joseph.

Asher ben Yehiel, in a responsum addressed to an unknown Rabbi Joseph, refers to a responsum by the latter's unnamed father-in-law, which, as Israel Ta-Shma showed, is known from other sources to have been authored by Yehiel of Paris.

A responsum by "Joseph ben Abraham" that appears, somewhat corrupted, in the standard editions of the Mordechai, and refers to Yehiel...

Bialer Kohen Elati Urbach (Rosh) Ta Shma