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The first four chapters of Hilchos Yesodei HaTorah have a lengthy commentary that is titled simply "פירוש". In standard editions of the Rambam, it wraps around the text, facing the "כסף משנה" (see here on the bottom right). It would appear that the work is of unknown authorship. The title page of the Shabsi Frankel edition simply describes it as "פירוש על ארבעה פרקים הראשונים של הלכות יסודי התורה".

My question is if anyone knows if there is any information on who the author of this work is? Has anyone attempted to identify the author? Have any theories been advanced?

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By comparing the text of one of his comments, is it any of the ones listed here? hebrewbooks.org/rambam – Double AA Dec 13 '12 at 18:26
@DoubleAA No, compare to here. (Btw, when other commentaries mention it, they usually call it the "מפרש".) – LazerA Dec 13 '12 at 18:41
We also have anonymous 'Peirush' to Rambam Kiddush Hachodesh hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=304 – Double AA Dec 13 '12 at 18:50
@DoubleAA True. Do you think they might be from the same person? – LazerA Dec 13 '12 at 18:57
I have no reason to assume either way. – Double AA Dec 13 '12 at 18:59
up vote 6 down vote accepted

In Yeshurin 21 Page 65 Rabbi Ezra Shaivet says that there are those who attribute it to רבי עובדיה בן דוד, however it is still unclear whether this is accurate. He does not indicate who it is that attributes this to the רבי עובדיה בן דוד.

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He says some attribute it to רבי עובדיה בן דוד. As far as I know, this was not any of the three Ra'avads (especially considering that all of their names were אברהם). This is the same name as the commentator to Kidush HaChodesh (as you noted in your comment to the question). – b a Dec 13 '12 at 19:59
@ba thanks - corrected – Gershon Gold Dec 13 '12 at 20:03
Excellent reference! Thanks! – LazerA Dec 13 '12 at 22:30
At this point, I'm going to accept this answer. But if a better answer comes along, I might have to switch. – LazerA Dec 23 '12 at 1:56

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