Graduate schools do admit students from different disciplines, often requiring them to take deficiency courses to bridge gaps in their knowledge. This practice is not merely a formality; it is implemented to ensure students are adequately prepared for advanced studies. Examples include students with undergraduate degrees in physics or engineering being allowed to take undergraduate courses before progressing to graduate-level classes. However, the necessity of these courses can lead to challenges, as some students struggle to meet the requirements and may leave the program. Additionally, students without a strong math background may face placement exams and be required to take undergraduate classes, which can complicate their path to graduation. Overall, while admission is possible for those from diverse academic backgrounds, success often hinges on the ability to meet foundational course requirements, particularly in less competitive programs.