Part 6/9:
Euler's relationship with Frederick the Great eventually soured when the king grew dismissive of him and prioritized foreign intellectuals. Despite this, Euler's work continued to yield significant results, culminating in the publication of "Introduction to the Analysis of the Infinite" in 1748, which set the standard for modern mathematics and algebra.
Later Life and Lasting Legacy
After a tumultuous period in Berlin and feeling increasingly unwelcome, Euler returned to St. Petersburg in 1766, where he continued to produce astonishing works even after becoming profoundly blind. His remarkable ability to perform complex calculations purely in his mind was enhanced by the diligent assistants who helped him dictate his ideas.