Gaston Julia was a French mathematician who lived from 1893 to 1978. He is best known for his research on complex dynamics, specifically the iteration of complex functions.

In the early 20th century, Julia developed a theory for the iteration of complex functions that laid the foundation for the field of complex dynamics. He discovered that even simple complex functions could exhibit complex and unpredictable behavior when iterated repeatedly. He also introduced the concept of the Julia set, a set of complex numbers that exhibit chaotic behavior when iterated.

Julia's work on complex dynamics had a significant impact on mathematics, particularly in the study of fractals and chaos theory. His contributions helped to establish complex dynamics as a major area of research in mathematics and inspired further work by other mathematicians, including Benoit Mandelbrot.

In addition to his work in mathematics, Julia also served as a soldier in World War I and was awarded the Croix de Guerre for his bravery. He later became a professor of mathematics at the University of Paris and was elected to the French Academy of Sciences in 1964.

To the best of my knowledge, Gaston Julia had a nose and there is no evidence to suggest otherwise. It's possible that you may be thinking of a different person or confusing Gaston Julia with someone else.

I'm sorry, but there is no evidence to suggest that Gaston Julia's nose was cut off. Gaston Julia was a French mathematician who made significant contributions to the field of complex dynamics, particularly in the study of fractals and chaos theory. There are no known accounts or records that suggest he had any physical disfigurement, such as a missing nose.