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The 111 pages that link to Leonhard Euler, each with the reason it gives.

• Johann BernoulliRelated: Johann taught Euler in Basel and helped launch his mathematical career.

• Lagrange's four-square theoremRelated: Euler discovered the four-square identity and developed related arguments before Lagrange's proof.

• Nine-point circleRelated: Euler’s line places the circle’s center within the broader geometry of triangle centers.

• Euler's criterionRelated: The criterion bears Euler's name and belongs to the number theory he developed.

• History of calculusRelated: His textbooks and methods made calculus a central working language of mathematics.

• Network scienceRelated: His abstraction of places and bridges supplied an early mathematical foundation for network study.

• Sophie GermainRelated: Euler’s mathematics was among the material Germain studied independently in her youth.

• Beta functionRelated: Euler introduced the beta integral and related it to the gamma function.

• Eulerian pathRelated: Euler proved that the Königsberg bridge puzzle had no solution and introduced its structural analysis.

• History of algebraRelated: Euler popularized conventions such as f(x) and advanced the use of algebraic symbols.

• Euler–Maclaurin formulaRelated: Euler developed summation formulas that became one source of the result.

• Euler's polyhedron formulaRelated: Euler published the relation for convex polyhedra in 1758.

• Jean le Rond d’AlembertCompared with: Euler was a major contemporary whose approaches often differed from d’Alembert’s.

• Perfect numberRelated: Euler proved that every even perfect number has Euclid’s form.

• Pierre Louis MaupertuisRelated: Euler developed a more general mathematical treatment of stationary action after Maupertuis’s proposal.

• Prussian Academy of SciencesRelated: Euler conducted much of his most productive Berlin-period research as an academy member.

• Saint Petersburg State UniversityRelated: He worked at the Saint Petersburg Academy of Sciences and helped establish its mathematical prestige.

• Steady flowRelated: Euler's equations provide a foundational description of ideal fluid motion, including steady cases.

• Waring's problemRelated: His work on sums of powers helped establish early special cases related to Waring's problem.

• Analytical mechanicsRelated: His variational and dynamical equations helped establish analytical methods before Lagrange.

• Elliptic integralRelated: Euler developed addition relations that advanced the theory of elliptic integrals.

• Fermat's theorem on sums of two squaresRelated: Euler supplied an early proof of Fermat’s claim using descent and arithmetic arguments.

• Jacobi triple productRelated: Euler’s pentagonal-number identity is a notable specialization closely related to Jacobi’s formula.

• Johann Heinrich LambertRelated: Euler’s results on trigonometric functions formed important background for Lambert’s proof about π.

• Pure mathematicsRelated: His wide-ranging research helped establish mathematics as a discipline with its own internal problems.

• q-seriesRelated: Euler derived foundational product and partition identities that became central q-series examples.

• Seven Bridges of KönigsbergRelated: Euler gave the 1736 proof that no route crosses every bridge exactly once.

• Alexis ClairautRelated: Euler developed mathematical tools for fluid motion and rotating-body problems related to Clairaut’s work.

• Bell numberRelated: Euler's studies of partitions and generating functions helped establish methods later used in enumerative combinatorics.

• Euler methodRelated: The method bears Euler’s name and reflects his contributions to differential equations and numerical calculation.

• Latin squareRelated: Euler introduced the Latin-square terminology and studied their orthogonality.

• Basel problemRelated: Euler solved the problem and established the value π²/6.

• De Moivre's formulaRelated: Euler's complex-exponential framework gives a concise derivation of the identity.

• Euclid–Euler theoremRelated: Euler proved that every even perfect number must have Euclid's stated form.

• Euler–Bernoulli beam theoryRelated: Euler developed foundational mathematical treatments of bending and elastic stability.

• Euler–Mascheroni constantRelated: Euler studied the limiting difference and introduced the notation γ.

• Lambert W functionRelated: Euler studied equations of the form xᵅ = eˣ that connect to Lambert W.

• Pafnuty ChebyshevCompared with: Euler’s prime-number investigations form an earlier tradition that Chebyshev advanced with rigorous bounds.

• Sum of two squares theoremRelated: Euler proved the divisibility result that excludes odd powers of primes congruent to 3 modulo 4.

• Bernoulli familyRelated: Johann Bernoulli taught Euler, whose career became one of the family's most important intellectual legacies.

• Euler's four-square identityRelated: The identity bears Euler's name and appears in his work on sums of squares.

• Euler's rotation theoremRelated: Euler established the result that bears his name.

• Rogers–Ramanujan identitiesRelated: His partition theorem is an early model for identities linking distinct partition conditions.

• Barbier's theoremRelated: Euler's geometric results on widths and perimeters form part of the theorem's mathematical background.

• Pentagonal number theoremRelated: Euler published the identity and used it in studying integer partitions.

• Venn diagramRelated: His earlier diagrams anticipated the form while showing only relations that actually hold.

• Bohr–Mollerup theoremRelated: Euler developed integral and product formulations that underpin the gamma function.

• Brook TaylorRelated: Euler’s later work made series methods far more systematic and widely used.

• History of classical mechanicsRelated: He converted Newtonian principles into powerful mathematical forms used across mechanics.

• History of combinatoricsRelated: His solutions to the Königsberg bridge problem helped establish graph theory.