We are have heard about lambda expressions. But what does it mean... Lambda? The talk will be about the story behind this term, from a little bitÂ more scientificÂ point of view. Church Lambda calculus, Entscheidungsproblem, and incompletenessÂ theorem. Almost all of that will be presented in Scala. And of course, you can later impress your friends with some impressive math tricks. There are going to be shown some very crazy code pieces such as the perfectly unusable implementation of boolean (based on lambda expressions). Come and see what purely functional means.