Very quickly review the “גמרא דף מב: “אמר רבה” until דף מג. “דאיתיה בגבולין (fifteen lines from top of the Amud)
Topic: גזירה דרבה שלא ליטול לולב בשבת
Quickly review “תוספת “אינהו who asks
Why is there a difference in the gezeira between Lulav and Shofar?
What’s the explanation for the incongruity of the gezeira on the Mitzvah of shofar during the time of Beis Hamikdash to the gezeira after the churban?
Question:
Why didn’t the Rabanan make a gezeira not to perform a Bris Milah on Shabbos to prevent someone from carrying the milah knife to consult with an expert?
Why didn’t the Rabanan make a gezeira not to blow shofar at the end of Yom Kippur?
Learn תוספת מגילה דף ד: “ויעבירנו (second Tosfos)
https://hebrewbooks.org/shas.aspx?mesechta=11&daf=4b&format=pdf
Learn “תוספת “הא
Question on Tosfos:
Tosfos asks that the mitzvah of Daled Minim should be allowed inside ones home whichever day of Sukkos coincides with Shabbos. The gemara is discussing the time period of the beis hamikdash which only had a Mitzvah in the Beis Hamikdash. How could Tosfos suugest to perform the mitzvah of Daled Minim in one’s home on any of the seven days?
Learn משנה ראש השנה פרק ג, משנה א
https://hebrewbooks.org/shas.aspx?mesechta=9&daf=29b&format=pdf
Note: Which locations and time periods was blowing shofar on Shabbos Rosh Hashanah permitted.
Learn “תוספת “אינהו who asks
Why is there a difference in the gezeira between Lulav and Shofar?
What’s the explanation for the incongruity of the gezeira on the Mitzvah of shofar during the time of Beis Hamikdash to the gezeira after the churban?
In Conclusion:
Why is the Mitzvah of Daled Minim not performed on the first day of Sukkos which coincides with Shabbos?
Is it because gezeira to prevent one from carrying on Shabbos, or because of the uncertainty whether the first day of Sukkos is the fifteenth or fourteenth of Tishrei?
See ריף מגילה דף ד: “גרסינן במסכת סוכה
https://hebrewbooks.org/pdfpager.aspx?req=14306&st=&pgnum=609
Learn ר”ן on our Gemara
https://hebrewbooks.org/pdfpager.aspx?req=14319&st=&pgnum=624
Bring a proof from the ר”ן if he agrees with the רי”ף