Arsenic and Old Lace (play) Arsenic and Old Lace (play) Arsenic and Old Lace is a play by American playwright Joseph Kesselring, written in 1939. It has become best known through the subsequent film adaptation starring Cary Grant and directed by Frank Capra. The play was directed by Bretaigne Windust, and opened on Broadway at the Fulton Theatre on January 10, 1941. On September 25, 1943, the play moved to the Hudson Theatre. It closed there on June 17, 1944, having played 1,444 performances. Of the twelve plays written by Kesselring, "Arsenic and Old Lace" was the most successful, and, according to the opening night
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