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1)

(a) Rava quoted a Beraisa: 'Yesh bi'Mechitzos ha'Kerem Lehakel u'Lehachmir'.
When is it Lehakel?

(b) What is the case of Lehachmir?

(c) What did Rava ask Abaye from here?

(d) What was Abaye's initial reaction to the Kashya?

(a) What is the case of Machol ha'Kerem, and why does that seem to present Abaye with a problem?

(b) How does Abaye dispense with both of the above Kashyos?

(a) What does Rav Yehudah say about three Karfifos, one beside the other, which made a joint Eruv, if the outer two are wider than the middle one? What exactly is the case? When is this permitted?

(b) What will be the Din if the middle Karfaf is wider than the two outer ones ...

1. ... if one of the outer ones is more than a Beis Sasayim?
2. ... if the middle Karfaf is more than a Beis Sasayim?

(a) The Gemara asks what the Din will be if there are two people in the middle Karfaf and one in each of the outer ones.
To which of the above two cases does this refer, and what exactly is the Sha'aleh?

(b) Why, according to the second side of the Sha'aleh, do we not at least combine the middle Karfaf with *one* of the two outer ones to give them as much space as they want?

(c) And what is the Sha'aleh in the case when there are two on either side and one in the middle? Why should we not combine the one in the middle at least with the two on *one* of the sides?

(d) What is the outcome of these Sha'alos?

5)

(a) What does Rav Chisda mean when he says 'Gidud Chamishah, u'Mechitzah Chamishah, Ein Mitztarfin'?

(b) Does that mean that neither courtyard may carry?

(c) Then how does he account for the Beraisa, which permits *both* courtyards to make separate Eruvin?

(d) Why can they not make a combined Eruv?

(a) In the above Beraisa, how does Rav Chisda explain the Seifa 'Pachos mi'Kahn, Me'arvin Echad ve'Ein Me'arvin Shenayim'? What does Pachos mi'Kahn refer to?

(b) But why can the top courtyard not make its own Eruv should they so wish? Why does the Beraisa say 've'Ein Me'arvin Shenayim'?

8)

(a) Rav Hoshaya asked what the Din will be if the wall between two courtyards broke, and new residents (so to speak) joined each other's courtyards.
How does the Gemara attempt to resolve this Sha'aleh from the Beraisa, which forbids the residents of the small courtyard to carry, if the wall that divided them from the large courtyard breaks?

(b) How does Rabah refute this proof?

(c) What is Abaye's objection to Rabah's wording? On which ruling of Rabah's does Abaye base his objection?

(a) Rav rules that when the wall between two courtyards falls, the residents may only carry four Amos in their own respective courtyard. Does Rav hold of 'Ho'il ve'Hutrah Hutrah'?

(b) How does this ruling of Rav tally with the fact that he rules like Rebbi Shimon, who considers all the courtyards as one?

(c) Rav did not actually make any statement issuing such a ruling. How do we know that *that* is how he holds?

(d) Since it was Shmuel's town, why did Rav see fit to turn round when Shmuel carried the sheet?

(a) What does Shmuel hold in the above case?

(b) Why does Shmuel not permit carrying from one courtyard to the other?

(c) Is there anything which Shmuel will permit to carry from one courtyard to the other?

(d) In the above incident, seeing as Shmuel anyway permits carrying up to the wall, why did he instruct them to put up the sheet in place of the broken wall?