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- Rav Yosef Karo attests that his Rebbe, Mahari Bei Rav, would follow the Rivash over any of the Rivash's contemporaries.
- It's possible that the Rivash didn't have the Mordechai available to him and only mentions what he saw quoted by other Rishonim. The practical relevance would be Hilcheta KeVatrai, which only applies if the later Posek saw the earlier one's work.
- The Rivash recommends following the Sefer HaManhig instead of Sefer HaShulchan, as the former was greater than the latter. Rav Chaim Palagi deduces from this Rivash that it's permissible to declare one Rav as greater than another. It's not prohibited or disparaging.
- The Rivash often goes on tangents to complete an idea and all its connected points before returning to his original idea.
- Beyond the Written Word: Some Aspects of Originality in the Responsa of R. Simeon Duran, Samuel Morell, Hakira vol. 19
- Avkat Rochel Siman 73, Shem HaGedolim (Gedolim, Yud 379)
- Yad Malachi (Klalei She'ar Mechabrim 6)
- Shu"t HaRivash Siman 40
- Yad Malachi (Klalei Shear Mechabrim 22)
- Shu"t Chaim BeYad Yoreh Deah 61
- Yad Malachi (Klalei Shear Mechabrim 28)