Okay kiddo, let me explain what Magnus and Oberhettinger means. They are actually two people who worked on different things that are related to math and science.
Magnus is a mathematician who studied a lot about linear algebra, which is like a way of working with lines and points on a graph. He also found a way to solve a hard math problem involving complex numbers, which are numbers that have a real part and an imaginary part.
Oberhettinger, on the other hand, was more into physics and astronomy. He was interested in understanding how the universe works, and he found ways to use math to figure that out. He also studied something called special functions, which are like really complicated math equations that help scientists describe things like waves and vibrations.
So, these two people didn't work together, but they both made important contributions to math and science. Magnus helped us understand more about lines and points on a graph, and Oberhettinger helped us understand more about waves and vibrations. They were both really smart and curious people who wanted to figure out how things work in the world around us.