Eruvin 10 – עירובין י

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Today’s Daf Yomi Question:

It is common practice today to wear Tzitzis with a neck hole in the middle; why doesn’t the empty space on both sides nullify the material which is situated between them?

4 thoughts on “Eruvin 10 – עירובין י

  1. Tosafos quotes the Ritzva that we don’t count the air from both sides when it is not a closed in area of space.

    Tosafos also says that normally we would have said Lavud. It is only because of the Tuma of Ohel, for which there is a specefic Halacha Lemoshe Misinai, that we need to have it Omed Meruba.

    Just like by a Mechitza, when it is a complete Mechitza it isn’t Batul anymore, here too, we have 3×3 on each side which makes it a Beged.

    There is no concept of Parutz by a Beged. It is about Mechitzos that the Gemara says that Hashem told Moshe to make sure that the Parutz is not more than the Omed.

    An extension of the previous point: A Mechitza closes off an area. When it is not entirely closed off we follow Omed Meruba Al Haparutz to consider it closed off. A Beged is a Beged no matter in which shape.

    Similarly, the space in a Beged is not countering the Beged, so they don’t work to cancel each other. A mechitza is the opposite of open space — the Pirtza — and they work to cancel each other out.

  2. In the case of use a pas of 3 amos and leaving a gap of two amos to create a valid opening,why do we assume that this works because maybe the open area of 10 amos will nullify the pas before you can create a closure of 5 amos?

    • Bittul applies only when each separate airspace in itself in larger than the wall material, otherwise the wall nullifies the airspace next to it, and it cannot join the airspace on the other side to nullify the wall.

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