Walter Trump

Walter Trump is a German mathematician and retired high school teacher. He is known for his work in recreational mathematics.
He has made contributions working on both the square [packing in a square|square packing problem] and the magic tile problem. In 1979 he discovered the optimal known packing of 11 equal squares in a larger square, and in 2003, along with Christian Boyer, developed the first known magic cube of order 5. In 2012, Trump et al. described a model for retention of liquid on random surfaces.
In 2014, he and Francis Gaspalou were able to calculate all 8 × 8 bimagic squares.
Until he retired in 2016, Trump worked as a teacher for mathematics and physics at the Gymnasium in Stein, Bavaria.