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The non-orientable genus, demigenus, or Euler genus of a connected, non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − k , where k is the non-orientable genus.
Euler invented the calculus of variations including its most well-known result, the Euler–Lagrange equation. Euler also pioneered the use of analytic methods to solve number theory problems. In doing so, he united two disparate branches of mathematics and introduced a new field of study, analytic number theory.
Euler's partition theorem relating the product and series representations of the Euler function Π(1 − x n) Goldbach–Euler theorem, stating that sum of 1/(k − 1), where k ranges over positive integers of the form m n for m ≥ 2 and n ≥ 2, equals 1; Gram–Euler theorem
The genus (sometimes called the demigenus or Euler genus) of a connected non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ , via the relationship χ = 2 − g , where g is the non-orientable ...
The Supreme Court on July 1, 2024, kept on hold efforts by Texas and Florida to limit how Facebook, TikTok, X, YouTube and other social media platforms regulate content in a ruling that strongly ...
Euler's number e corresponds to shaded area equal to 1, introduced in chapter VII. Introductio in analysin infinitorum (Latin: [1] Introduction to the Analysis of the Infinite) is a two-volume work by Leonhard Euler which lays the foundations of mathematical analysis.
Jennifer Love Hewitt is relishing a recent milestone.. On Nov. 21, the 9-1-1 actress, 45, and her husband, actor Brian Hallisay, celebrated 11 years of marriage. "That's like 190 years in ...
JONATHAN NACKSTRAND/AFP via Getty Princess Sofia of Sweden attends the royal banquet to honour the laureates of the Nobel Prize 2019 following the Award ceremony on Dec. 10, 2022