Rabbi Baruch Bodenheim: Gemara Eruvin: First Perek, יום שני Iyar 3, Daf 9b-10a (04/24/23)

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Sugya: נראה בפנים ואינו נראה מבחוץ and נראה מבחוץ ואינו נראה מבפנים 

Review the גמרא דף ט: “ור’ יוחנן (eighteen lines from the top of the Amud) until “דף י. “האי  ” (second line from top of the Amud)

Major Question:

How could a Lechi be created through Lavud when there is no post that is noticable? 

Note: in Sugya of מבוי שרצפו בלחיים Rav Ashi said we view many individual Lechi as one wide Lechi through Lavud. 

Question:

Is the machlokes whether נראה מבחוץ  is a valid Lechi dependent on the argument whether the היכר is for the people outside the Mavui or inside the Mavui? 

See גאון יעקב 

https://hebrewbooks.org/pdfpager.aspx?req=14053&st=&pgnum=52

And ר’ יהונתן “מה שנראה מבפנים 

https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=329

See רש”י דף ח. “נראה מבחוץ 

Note: the discussion is not about a Lechi but rather about creating a פתח – door

See the קהילת יעקב עירובין סוף ס’ ה who brings a major chidush from the תורת רפאל in the concept of Lechi in regards to נראה מבחוץ ואינו נראה מבפנים 

Learn גמרא סוכה דף יט. “רב אשי אשכחיה (thirteen lines from top of the Amud) until the two dots 

Learn תוס’ “אחוי who asks two questions on how can a Lechi be used to create a third wall for Sukkah.

Learn רא”ש ס’ לד “רב אשי who elaborates on the questions of Tosfos and gives an answer 

Quickly review תוס’ דף ט: “ולרשב”ג 

Review מהרש”א

https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=265

Major Question:

According to the opinion לחי משום מחיצה and חודו חיצון סותם (we consider the outer face plate of the Lechi as closing the area). How could the Lechi partially protruding outside the Mavui permit one to carry in the Mavui as there is no wall opposite the Lechi for the Lechi to connect to?

See ב’ גר”א או”ח ס’ שס”ג סע’ יג

https://hebrewbooks.org/pdfpager.aspx?req=14325&st=&pgnum=232