R' Akiva Eiger

If the mevarech does not want to drink from the Birkat HaMazon cup, may one of the assembled drink instead, and may two people's drinking combine toward the minimum?

The mevarech should not recite Borei Pri HaGafen and instead the drinker (one of the assembled) shou…

Can three who came from three separate groups (each of which made zimun) combine to make a new zimun?

The 'parach zimun' rule (Seif 5) applies only if the original groups performed zimun before the thre…

Must the haftarah be read only after a prior Torah reading from a valid Sefer Torah?

If from the outset they knew the Sefer Torah was invalid and read it only to preserve the custom, it…

Is cooking with toldot ha'ur (heat transferred from fire, not direct flame) prohibited on Shabbat, and does this extend to toldot hachama (sun-generated heat)?

One may leave food on toldot ha'ur (even fire-heated items) — the prohibition is only placing food t…

May a vessel be placed beneath dripping must (tirmosh) from unpressed grapes on Shabbat?

Regarding emptying a full collecting vessel: it is better to place a new vessel on top of the filled…

Is it forbidden to directly feed a child food that is rabbinically forbidden?

Even per the Rashba, direct feeding of a rabbinic prohibition to a child for the adult's benefit is …

Is a korah made from asherah wood valid?

If the korah is four tefachim wide, the question depends on a dispute among Tosafot: according to on…

If an onen recited Shema while in a state of aninus, has he fulfilled his obligation?

If an onen recited Shema during aninus, he has not fulfilled his obligation and must recite again af…

If one recites Sh'ma in a place where recitation is forbidden, must one go back and recite again?

For a prohibition involving urine (which is only rabbinic), one does not go back and repeat the Sh'm…