Complex sentence: Korn was the son of Moritz and Malwine Schottlaender; he studied physics and mathematics in Leipzig at the age of 15, from where he graduated in 1890.
Split into simpler sentences: Korn was the son of Moritz and Malwine Schottlaender. He then studied physics and mathematics in Leipzig at the age of 15, from where he graduated in 1890.