Gittin 40: Jangling Coins to Freedom

When a slave-owner's conduct has impact on the slave's status. To what extent can a man free a female slave in order to marry her? Plus, the stories of R. Dimi, who traveled between Israel and Babylonia - to address the case where heirs are pushed to free the slaves if their benefactor. Also, a slave owned by 2 people, one of whom frees his half of the slave, but the other owner does not go along with freeing him. To the extent that he transfers his ownership to a minor - rather than free his half of the slave. And then that minor, presumably a younger child, is prevailed upon (via jangling coins) to give up the ownership. Plus, the formulations of the statement that one is freeing a slave - several versions are all acceptable. Also, what happens when a master and a slave dispute whether the master indeed freed the slave? And how valuable an admission in court counts - like 100 witnesses.