Kummer is a term that can refer to various concepts, but it is often associated with the mathematician Ernst Eduard Kummer, known for his work in number theory. He developed the Kummer's theorem, which deals with the properties of prime numbers and their relationships in algebraic number fields. His contributions have had a lasting impact on modern mathematics. In a different context, "Kummer" can also refer to a type of pastry, particularly in German-speaking regions. These pastries are typically sweet and can be filled with various ingredients, such as fruits or creams. They are enjoyed as desserts or snacks and are often found in bakeries.