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prepared by Rabbi Eliezer Chrysler
Kollel Iyun Hadaf, Jerusalem

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Eruvin 7

ERUVIN 6-10 sponsored by a generous grant from an anonymous donor. Kollel Iyun Hadaf is indebted to him for his encouragement and support and prays that Hashem will repay him in kind.


(a) Rav Nachman bar Yitzchok reconciles the fact that in Neherda'a, they followed the Chumros of both Rav and Shmuel, with Shlomoh ha'Melech's description of someone who does this as 'ha'Kesil ba'Choshech Holech', by quoting Rav Huna, who maintains that, according to Rav, 'Halachah ve'Ein Morin Ken'. What does he mean? How does that answer the question?

(b) In the opinion of Rav Ada bar Ahavah, Rav holds 'Halachah u'Morin Ken'. How does *he* explain the double ruling of the Poskim of Neherda'a?

(a) Beis Shamai and Beis Hillel dispute the Shiur of a Shedrah (spinal cord) with regard to both Tum'as Mes and Tereifus. According to Beis Hillel, the Shiur is one vertebra.
What is the Shiur, according to Beis Shamai?

(b) How does Shlomoh ha'Melech's principle of 've'ha'Kesil ba'Choshech Holech' apply there?

(a) Rebbi Akiva picked an Esrog on the first of Shevat, and gave Ma'aser Le'chumra like both Beis Hillel and Beis Shamai.
What does that mean? Which two Ma'asros are we referring to?

(b) How could he do that? Why was he not termed a 'Kesil ba'Choshech Holech'?

(a) Rav Yosef quotes Rav Yehudah in the name of Shmuel as saying that Chananyah only requires one door according to Beis Hillel (two according to Beis Shamai), when the Mavoy runs into a Seratya or a Pelatya at either end. What is the difference between a Seratya and a Pelatya?

(b) What will Chananya hold, if one end of the Mavoy runs into a Karmelis?

(a) What Tikun will the Mavoy require (according to Rav Yosef, quoting Rav Yehudah), if it runs into a courtyard behind the house (a Rechavah)?

(b) What sort of Rechavah are we talking about, one that is open or one that is closed?

(c) Does the Rechavah require an Eruv to cover the Mavoy?

(d) What is the difference between a Rechavah in this case, and a Chatzer?

Answers to questions



(a) Rav is quoted as saying 'Mavoy she'Nifratz be'Milu'o le'Chatzer, ve'Nifretzah Chatzer Kenegdo, Chatzer Muteres, u'Mavoy Asur'. According to the Gemara's initial understanding, why did Rav forbid carrying in the Mavoy?

(b) The Gemara therefore thinks that, for two reasons, Rav Yehudah (in 5a) cannot have been quoting Rav.
What are they?

(c) So whom must he have been quoting?

(d) How does Rav Sheshes finally explain Rav by a Mavoy leading into a Chatzer, to conform with Rav Yehudah's statement by a Mavoy leading into a Rechavah?

7) Why, according to Rav (when they did not make an Eruv), may one carry in the Chatzer, but not in the Mavoy?

Answers to questions
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