1- Our Mishna discusses the detailed laws of תחומין. Meaning the limitation placed on the transportation of utensils based on who is considered the owner.
We mentioned that the Gemara in Eiruvin discusses this topic at length. But there the issue is the person and his תחום. In our Gemara, since one may carry on Yom Tov, the topic is the movement of items that are carried.
2 – We spoke about the maps prepared by an organization in Monsey delineating the Techum for many cities. The Rov that prepares these detailed maps is Reb Yechezkel Weiss. He can be reached at 845-709-2181 or firstname.lastname@example.org
3 – The difference between Sephardim and Ashkenazim in regards to an Eiruv Techumin. See here in the Mechaber and Ramo.
This would be a classical case of someone who places an Eiruv at 2,000 Amos outside his city limits to the North. He then spends the night in the city.
Can he walk around in his city, where he spent the night, to the South?
4 – We spoke about need to actually be able to eat the food one places as an Eiruv Techumin. A can of sardines without a can opener may not work….
5- Case of an item shared by two people with different תחומין. The item is at the end of each one’s 2000 Amos.
It cannot be moved at all!
6- We discussed the ‘squaring the area of a city” North to South based on a map.