Geometry became the topic of Perron's doctoral thesis directed by Lindemann and Perron went on to complete his habilitation at Munich and was appointed a lecturer there in 1906.
Geometry ang naging paksa ng Perron ng doktor tesis Directed by Lindemann at Perron nagpunta sa upang makumpleto ang kanyang habilitation sa Munich at noon ay hihirangin ng isang lektor doon sa 1906.