Arsenic and Old Lace (film) Arsenic and Old Lace (film) Arsenic and Old Lace is a 1944 American dark comedy film directed by Frank Capra, starring Cary Grant, and based on Joseph Kesselring's play "Arsenic and Old Lace". The script adaptation was by Julius J. Epstein and Philip G. Epstein. Capra actually filmed the movie in 1941 because of star Cary Grant's availability, but it was not released until 1944, after the original stage version had finished its run on Broadway. The lead role of Mortimer Brewster was originally intended for Bob Hope, but he could not be released from his contract with Paramount Pictures.
Identity element Identity element In mathematics, an identity element or neutral element is a special type of element of a set with respect to a binary operation on that set, which leaves other elements unchanged when combined with them. This concept is used in algebraic structures such as groups and rings. The term "identity element" is often shortened to "identity" (as will be done in this article) when there is no possibility of confusion, but the identity implicitly depends on the binary operation it is associated with. Let be a set with a binary operation ∗ on it. Then an element of