* Algebra: Harriot was one of the first mathematicians to use symbolic notation in algebra. He introduced symbols for unknown quantities and operations, making equations easier to understand and manipulate. This paved the way for the development of modern algebraic notation.
* Equations: He studied equations extensively, focusing on solving them and developing methods for finding solutions. He explored concepts like roots and coefficients of equations, and his work laid the foundation for later developments in the field.
* Geometry: Harriot investigated the properties of geometric figures, including the relationship between angles and sides. His work in geometry was influenced by his astronomical observations, as he applied mathematical principles to understand the movements of celestial bodies.
* Trigonometry: Harriot made advances in trigonometry, exploring the relationships between angles and sides of triangles. He developed new formulas and tables that were crucial for astronomical calculations.
While his work wasn't as widely disseminated as some of his contemporaries, Harriot's contributions were substantial and laid the groundwork for future advancements in mathematics.
It's important to note that there are numerous mathematicians with the name "Thomas," so you might have been thinking of a different individual. If you can provide more context or a specific time period, I might be able to help you narrow it down.
