Godofredus Friesdlein (1 results)

Soft cover. Condition: Good. (Hypsocles) Godofredus Friesdlein, De Hypsicle Mathematico. Rome, Typografia Scientarum Mathematicarum et Physicarum, 1874. 43pp. 12X9". Original r\wrappers, though they are quite nicked and bumped, Unopened. GOOD copy. Scarce. $95 [++] Hypsicles of Alexandria, also known as Hypsicles of Carthage, was an ancient Greek mathematician and astronomer who lived during the 2nd century BCE. He is best known for his work in mathematics, particularly his contributions to trigonometry. He wrote a treatise titled "On Ascensions" (or "De ascensionibus") which is considered one of the earliest surviving works on trigonometry. In this treatise, he studied the relationships between angles and the lengths of chords in a circle, developing a precursor to the modern concept of trigonometric functions. Hypsicles also made contributions to the field of astronomy. He wrote a work called "Book XIV" that is believed to have contained astronomical observations and calculations. Unfortunately, this work has not survived, but references to it can be found in the writings of later astronomers and mathematicians. While Hypsicles may not be as well-known as some other ancient mathematicians, his work on trigonometry laid the foundation for later developments in the field and influenced the works of subsequent mathematicians, including Hipparchus and Ptolemy.