Bernhard Riemann was a 19th-century mathematician who made significant contributions to the field of analysis and number theory. He is perhaps best known for the Riemann Hypothesis, which remains one of the most important unsolved problems in mathematics. Some synonyms for Bernhard Riemann include mathematician, scholar, analyst, theorist, number theorist, and problem solver. Other adjectives that might be used to describe Riemann include innovative, brilliant, influential, and groundbreaking. With his pioneering work in the field, Riemann revolutionized the study of mathematics and played a significant role in shaping modern mathematical thought.