Are Measure for Measure and Mathis der Maler both fictional?
Mathis der Maler (opera) Mathis der Maler ("Matthias the Painter") is an opera by Paul Hindemith. The opera's genesis lay in Hindemith's interest in the Reformation. The work's protagonist, Matthias Grünewald, was an actual historical figure who flourished in that era, and whose art, in particular the Isenheim Altarpiece, inspired many creative figures in the early 20th century, including Joris-Karl Huysmans's novel "Là-bas".
Anti-Life Equation The Anti-Life Equation is a fictional mathematical equation appearing in American comic books published by DC Comics. In Jack Kirby's Fourth World setting, the Anti-Life Equation is a formula for total control over the minds of sentient beings, that is sought by Darkseid, who, for this reason, sends his forces to Earth, as he believes part of the equation exists in the subconscious. Various comics have defined the equation in different ways, but a common interpretation is that the equation is a mathematical proof of the futility of living.