(Mishnah): If a man's wife dies, he may marry her sister. If he divorced her and then she died, he may marry her sister. If she married someone else and died, he may marry her sister.

If a Yevamah died, the Yavam may marry her sister. If he did Chalitzah to her and she died, he may marry her sister. If she married another man and died, he may marry her sister.

(Gemara) Inference: [If a Yevamah died, the Yavam] is forbidden to her mother.

Question: Didn't R. Yakov bar Acha say in the name of R. Lazar that if a Shomeres Yavam died, [the Yavam] is permitted to her mother?!

Answer: (Really, he is permitted even to her mother.) Because [the next clause] taught that if he did Chalitzah to her and she died, he is permitted to her sister (and there he is permitted only to her sister, but not to other relatives, also the Reisha) taught her sister.

(Mishnah - R. Gamliel): If a Yavam gave a Get to his Yevamah, a second Get does not take effect (to forbid the giver to the receiver's relatives). A Ma'amar does not take effect after a Ma'amar, nor does Bi'ah take effect after Bi'ah, nor Chalitzah after Chalitzah;

Chachamim say, a Get takes effect after a Get and a Ma'amar takes effect after a Ma'amar, but nothing takes effect after Bi'ah or Chalitzah.

(Gemara): "Yevamah Yavo Aleha" is Bi'ah. "V'Lakcho Lo l'Ishah" is Ma'amar.

Suggestion: Perhaps just like Bi'ah finalizes her (makes her his full wife), also Ma'amar!

Rejection: "V'Yibmah" - the entire Parshah is tied to (depends on) Yibum. Bi'ah finalizes her, but Ma'amar does not finalize her.

Question: If so, what effect does Ma'amar have?

Answer: It forbids her to the [other] brothers.

R. Shimon says, [it is a Safek whether] Ma'amar acquires or does not acquire.

Question: What is R. Shimon's reason?

Answer: "Yevamah Yavo Aleha" is Bi'ah. "V'Lakchah Lo l'Ishah" is Ma'amar. Just like Bi'ah finalizes her, also Ma'amar finalizes her;

Or, perhaps "Yevamah Yavo Aleha", and she is Lekuchah Lo (married to him), and the Ma'amar did not do anything to her.

R. Elazar ben Arach says, Ma'amar makes a full Kinyan in a Yevamah.

Question: What is R. Elazar ben Arach's source?

Answer: "V'Lakchah Lo l'Ishah" - [Ma'amar] is like [regular] Kidushin of a woman. Just like Kidushei Ishah acquires a full Kinyan, also Ma'amar acquires a full Kinyan.

What is Ma'amar of a Yevamah? 'You are Mekudeshes to me with money or Shaveh Kesef.'

Just like Rabanan say that Ma'amar acquires and leaves over, so they say that Get acquires and leaves over.

Suggestion: A Get should totally exempt, from a Kal v'Chomer! An Eshes Ish, Chalitzah does not exempt her, but Get exempts her. A Yevamah, Chalitzah exempts her, all the more so Get should exempt her!

Rejection: "V'Chaltzah" - she is permitted through Chalitzah, and she is not permitted through a Get.

Suggestion: [If so, a Get] should not exempt [a Yevamah] at all!

Rejection - Question: It says "Lo Sihyeh [Eshes ha'Mes ha'Chutzah] l'Ish Zar" - what is the case?

If [the Yavam] had Bi'ah with her, she is his wife! (Obviously she is forbidden to other men!)

If he did Chalitzah to her, she may marry another man!

Answer: Rather, the case is, he gave a Get to her. (Now, also the Yavam is a Zar (i.e. forbidden) to her.)

Note: Why can't we say that the verse forbids a Shomeres Yavam (to whom nothing was done) to a stranger? MESHECH CHACHMAH (Devarim 25:5) - "Chutzah" connotes that she is outside, i.e. she was disqualified from Yibum.

Support (Chizkiyah - Beraisa) Question: What is the source that if one gave a Get to his Yevamah, that she is forbidden to him and to his brothers?

Answer: Regarding him, I apply "Asher Shilach" (in Parshas Machzir Gerushaso, these words are extra, to hint to one who expelled one who is not his wife, that she is forbidden to him). Regarding the brothers, I apply "Asher Shulchah" (that hints that even if someone else expelled her, she is forbidden to him).

Suggestion: Chalitzah should permit an Eshes Ish, from a Kal v'Chomer! A Yevamah, a Get does not exempt her, but Chalitzah exempts her. An Eshes Ish, a Get exempts her, all the more so Chalitzah should exempt her!

Rejection: "V'Chasav Lah Sefer Kerisus..." - she is permitted through a Get, and she is not permitted through Chalitzah.

Suggestion: [Chalitzah] should permit [an Eshes Ish partially], and leave over!

Rejection: There, it says "Lo Sihyeh... l'Ish Zar" [to teach that if a Yavam gave a Get to his Yevamah, it exempts and leaves over]. Here, what source do you have [to say so about Chalitzah to an Eshes Ish]?