Leonhard Euler

About Leonhard Euler

Leonhard Euler (1707–1783) stands as one of history's most significant mathematicians, earning an HPI Rank of #220 out of approximately 15,000 figures. His foundational work spanned nearly every branch of mathematics, including calculus, number theory, and graph theory. He introduced much of modern mathematical notation, such as the concept of a function ($f(x)$), the use of the Greek letter $\pi$ for the ratio of a circle's circumference to its diameter, and the symbol $e$ for the base of the natural logarithm. His prolific output ensured his enduring, high placement in historical importance rankings.

Despite this profound historical influence, Euler's modern internet attention, measured by 826K annualized Wikipedia views in 2025, shows a near 1x match to his expected attention relative to his importance score. This suggests that while not entirely overlooked, his online presence is modest compared to many modern figures. For context, figures like John F. Kennedy (#328 importance) garner over seven times his view count (7.2M views), highlighting a potential gap where foundational scientific figures receive less casual traffic than more recent, albeit less historically important, personalities.

Euler’s attention is currently seeing a slight increase, with a +4.5% year-over-year change in views. However, recent interest shows a slight dip, with 2025 Momentum decreasing by -11% between Q1 and Q3, suggesting his current trajectory is gently declining after a preceding boost.