Rabbi Baruch Bodenheim: Gemara Eruvin: First Perek, יום חמישי Tishrei 4 Daf 2b-3a (09/29/22)

Learn the גמרא דף ב: “ולא היא (approx 15 lines from bottom of the amud) until דף ג. “והאי מאי

Questions:
What is the size of the entrance of a king’s palace?
Where do we learn the size of palatial entrance?
What are we exactly learning from פתח מלכים?
See פ’ מש ‘ לרמב”ם
And תוס’ רא”ש & גאון יעקב
See חידושי הר”ן מסכת עירובין דף ג עמוד א “קורה

The Gemara asked three questions on the requirements of the opening of a mavui if it learnt from the entrance of the Heichal.
Why did the gemara switch the way it asked the question?
Learn תוס’ “אלא and מהרש”א