Learn the fifth בעא מיניה אביי on the top of דף כ until the next בעא מיניה אביי (thirteen lines from the top of the Amud)
Questions:
What is the ספק of אביי when one Chatzer opens to the area between the פסין?
Learn ריטב”א
https://hebrewbooks.org/pdfpager.aspx?req=37287&st=&pgnum=31
What is the additional ספק of אביי when two Chatzerim opens to the area between the פסין?
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In the case where two Chatzerim opens to the area between the פסין is it inherently prohibited to carry from either of the two Chatzerim to the area between the פסין or only because of a Gezaira?
Learn ריטב”א
Learn ח’ ר”ן (attached)
What is the concern of the Rabanan that led them to make a gezaira even when an עירוב is made between the two Chatzerim?
There are three different approaches in the Rishonim
Learn ריטב”א
Learn ח’ ר”ן
Learn רשב”א
https://hebrewbooks.org/pdfpager.aspx?req=37275&st=&pgnum=24