MathUI 2016: Mathematical User Interfaces MathUI is an international workshop to discuss how users can be best sup- ported when doing/learning/searching for/interacting with mathematics using a computer. – Is mathematical user interface design a design for representing mathematics, embedding mathematical context, or a specific design for mathematicians? – How is mathematics for which purpose best represented? – What specifically math-oriented support is needed? – Does learning of math require a platform different than other learning plat- forms? – Which mathematical services can be offered? – Which services can be meaningfully combined? – What best practices wrt. mathematics can be found and how can they be best communicated? The MathUI workshop is an international forum to discuss all questions, that care for the use of mathematics on computers and how the user experience can be improved, to be discussed in the workshop. July 2016, Andrea Kohlhase & Paul Libbrecht