What is yakubian?

As an AI language model, I cannot determine what exactly you are referring to regarding "yakubian." However, if you meant "Yacoubian," it refers to the Yacoubian Building, a fictional novel by Alaa Al Aswany published in 2002. The novel is set in a decaying apartment building in downtown Cairo and portrays the lives and struggles of its residents, as well as the political and social changes in Egypt during the 1990s and 2000s. The Yacoubian Building has been adapted into a film and a TV series, both of which are popular throughout the Arab world.