AI & ChatGPT searches , social queriess for EULER SYSTEM
Search references for EULER SYSTEM. Phrases containing EULER SYSTEM
See searches and references containing EULER SYSTEM!
Search references for EULER SYSTEM. Phrases containing EULER SYSTEM
See searches and references containing EULER SYSTEM!EULER SYSTEM
Mathematical concept
In mathematics, particularly number theory, an Euler system is a collection of compatible elements of Galois cohomology groups indexed by fields. They
Euler_system
mathematician Leonhard Euler (1707–1783), who made many important discoveries and innovations. Many of these items named after Euler include their own unique
List of topics named after Leonhard Euler
List_of_topics_named_after_Leonhard_Euler
Description of the orientation of a rigid body
The Euler angles are three angles introduced by Leonhard Euler to describe the orientation of a rigid body with respect to a fixed coordinate system. They
Euler_angles
Second-order partial differential equation describing motion of mechanical system
the calculus of variations and classical mechanics, the Euler–Lagrange equations are a system of second-order ordinary differential equations whose solutions
Euler–Lagrange_equation
Swiss mathematician (1707–1783)
Leonhard Euler (/ˈɔɪlər/ OY-lər; 15 April 1707 – 18 September 1783) was a Swiss polymath who was active as a mathematician, physicist, astronomer, logician
Leonhard_Euler
Approach to finding numerical solutions of ordinary differential equations
In mathematics and computational science, the Euler method (also called the forward Euler method) is a first-order numerical procedure for solving ordinary
Euler_method
Theorem on modular exponentiation
In number theory, Euler's theorem (also known as the Fermat–Euler theorem or Euler's totient theorem) states that, if n and a are coprime positive integers
Euler's_theorem
Set of quasilinear hyperbolic equations governing adiabatic and inviscid flow
dynamics, the Euler equations are a set of partial differential equations governing adiabatic and inviscid flow. They are named after Leonhard Euler. In particular
Euler equations (fluid dynamics)
Euler_equations_(fluid_dynamics)
Modification of the Euler method for solving Hamilton's equations
semi-implicit Euler method, also called symplectic Euler, semi-explicit Euler, Euler–Cromer, and Newton–Størmer–Verlet (NSV), is a modification of the Euler method
Semi-implicit_Euler_method
Number of integers coprime to and less than n
\ln(x)} or log e ( x ) {\displaystyle \log _{e}(x)} . In number theory, Euler's totient function counts the positive integers up to a given integer n {\displaystyle
Euler's_totient_function
Commercial Linux distribution
EulerOS is a commercial Linux distribution developed by Huawei based on Red Hat Enterprise Linux to provide an operating system for server and cloud environments
EulerOS
Scientific educational toy
Euler's Disk, invented between 1987 and 1990 by Joseph Bendik, is a trademarked scientific educational toy. It is used to illustrate and study the dynamic
Euler's_Disk
American mathematician (born 1943)
questions in the course of my work on Euler systems, and together with Illusie read critically the Euler system argument. Their questions led to my discovery
Nick_Katz
Integers occurring in the coefficients of the Taylor series of 1/cosh t
In mathematics, the Euler numbers are a sequence En of integers (sequence A122045 in the OEIS) defined by the Taylor series expansion 1 cosh t = 2 e
Euler_numbers
Numerical method for ordinary differential equations
numerical analysis and scientific computing, the backward Euler method (or implicit Euler method) is one of the most basic numerical methods for the
Backward_Euler_method
Cuboid whose edges and face diagonals have integer lengths
an Euler brick, named after Leonhard Euler, is a rectangular cuboid whose edges and face diagonals all have integer lengths. A primitive Euler brick
Euler_brick
Topics referred to by the same term
Leonhard Euler (1707–1783) was a Swiss mathematician and physicist. Euler may also refer to: Euler (crater), a lunar impact crater in the southern half
Euler_(disambiguation)
Graphical set representation involving overlapping shapes
An Euler diagram (/ˈɔɪlər/, OY-lər) is a diagrammatic means of representing sets and their relationships. They are particularly useful for explaining
Euler_diagram
1995 publication in mathematics
the proof which gave a bound for the order of a particular group: the Euler system used to extend Kolyvagin and Flach's method was incomplete. The error
Wiles's proof of Fermat's Last Theorem
Wiles's_proof_of_Fermat's_Last_Theorem
2.71828…, base of natural logarithms
sometimes called Euler's number, after the Swiss mathematician Leonhard Euler, though this can invite confusion with Euler numbers, or with Euler's constant,
E_(mathematical_constant)
Group of languages
68–76. Euler (2022), pp. 25–26. Seebold (1998), p. 13. Euler (2022), pp. 238, 243. Euler (2022), p. 243. Robinson (1992). Euler (2013), p. 53. Euler (2022)
West_Germanic_languages
Line constructed from a triangle
In geometry, the Euler line, named after Leonhard Euler (/ˈɔɪlər/ OY-lər), is a line determined from any triangle that is not equilateral. It is a central
Euler_line
Method for load calculation in construction
Euler–Bernoulli beam theory (also known as engineer's beam theory or classical beam theory) is a simplification of the linear theory of elasticity which
Euler–Bernoulli_beam_theory
Euler Mathematical Toolbox (or EuMathT; formerly Euler) is a free and open-source numerical software package. It contains a matrix language, a graphical
Euler_Mathematical_Toolbox
17th-century conjecture proved by Andrew Wiles in 1994
hints of cutting-edge research and new techniques, and discovered an Euler system recently developed by Victor Kolyvagin and Matthias Flach that seemed
Fermat's_Last_Theorem
British mathematician who proved Fermat's Last Theorem
related to properties of the Selmer group and use of a tool called an Euler system. Wiles tried and failed for over a year to repair his proof. According
Andrew_Wiles
Curve whose curvature changes linearly
An Euler spiral is a curve whose curvature changes linearly with its curve length (the curvature of a circular curve is equal to the reciprocal of the
Euler_spiral
Pair in mathematics
mathematics, a Lagrangian system is a pair (Y, L), consisting of a smooth fiber bundle Y → X and a Lagrangian density L, which yields the Euler–Lagrange differential
Lagrangian_system
American mathematician
astronomer and physicist Judith Young. CEILIDH Torus-based cryptography Euler system Stark conjectures Rubin, Karl (1987). "Tate-Shafarevich groups and L-functions
Karl_Rubin
Used to count, measure, and label
would later be named Euler's number (e). Irrational numbers began to be studied systematically in the 18th century, with Leonhard Euler who proved that the
Number
Topics referred to by the same term
In mathematics Euler operators may refer to: Euler–Lagrange differential operators d/dx: see Lagrangian system Cauchy–Euler operators e.g. x·d/dx quantum
Euler_operator
Russian mathematician (born 1955)
March, 1955) is a Russian mathematician who wrote a series of papers on Euler systems, leading to breakthroughs on the Birch and Swinnerton-Dyer conjecture
Victor_Kolyvagin
Modular unit in mathematics
quadratic fields of cyclotomic units. They form an example of an Euler system. A system of elliptic units may be constructed for an elliptic curve E with
Elliptic_unit
Mathematical strategy
Spatial rotations in three dimensions can be parametrized using both Euler angles and unit quaternions. This article explains how to convert between the
Conversion between quaternions and Euler angles
Conversion_between_quaternions_and_Euler_angles
Quasilinear first-order ordinary differential equation
In classical mechanics, Euler's rotation equations are a vectorial quasilinear first-order ordinary differential equation describing the rotation of a
Euler's equations (rigid body dynamics)
Euler's_equations_(rigid_body_dynamics)
Movement with a fixed point is rotation
In geometry, Euler's rotation theorem states that, in three-dimensional space, any displacement of a rigid body such that a point on the body remains
Euler's_rotation_theorem
The 18th-century Swiss mathematician Leonhard Euler (1707–1783) is among the most prolific and successful mathematicians in the history of the field.
Contributions of Leonhard Euler to mathematics
Contributions_of_Leonhard_Euler_to_mathematics
Figure skating jump, used as transition in a jump sequence
The Euler is an edge jump in figure skating. The Euler jump was known as the half loop jump in International Skating Union (ISU) regulations prior to the
Euler_jump
Analytic function in mathematics
The Riemann zeta function or Euler–Riemann zeta function, denoted by the lowercase Greek letter ζ (zeta), is a mathematical function of a complex variable
Riemann_zeta_function
Chained intrinsic rotations about body-fixed specific axes
rotations are three chained intrinsic rotations about body-fixed specific axes. Euler rotations and Tait–Bryan rotations are particular cases of the Davenport
Davenport_chained_rotations
Extend Newton's laws of motion to rigid bodies
motion. They were formulated by Leonhard Euler about 50 years after Isaac Newton formulated his laws. Euler's first law states that the rate of change
Euler's_laws_of_motion
Script typeface
implemented with the computer-assisted design system Metafont developed by Knuth. Zapf designed and drew the Euler alphabets in 1980–81 and provided critique
AMS_Euler
Extension of the factorial function
}t^{z-1}e^{-t}\,dt} converges absolutely, and is known as the Euler integral of the second kind. (Euler's integral of the first kind is the beta function.) The
Gamma_function
Diagram that shows all possible logical relations between a collection of sets
as by Christian Weise in 1712 (Nucleus Logicoe Wiesianoe) and Leonhard Euler in 1768 (Letters to a German Princess). The idea was popularised by Venn
Venn_diagram
Computation modulo a fixed integer
(mod m). However, the following is true: If c ≡ d (mod φ(m)), where φ is Euler's totient function, then ac ≡ ad (mod m)—provided that a is coprime with
Modular_arithmetic
Mathematical paradox
In mathematics, Cramer's paradox or the Cramer–Euler paradox is the statement that the number of points of intersection of two higher-order curves in
Cramer's_paradox
Study of the effects of forces on undeformable bodies
dynamics Multibody system Polhode Herpolhode Precession Poinsot's ellipsoid Gyroscope Physics engine Physics processing unit Euler's Equation B. Paul,
Rigid_body_dynamics
Family of computer operating systems
Operating System V6.1.2 with SP1 or later certification". Archived from the original on April 8, 2016. The Open Group (September 8, 2016). "Huawei EulerOS 2
Unix
Methods used to find numerical solutions of ordinary differential equations
Euler method (or forward Euler method, in contrast with the backward Euler method, to be described below). The method is named after Leonhard Euler who
Numerical methods for ordinary differential equations
Numerical_methods_for_ordinary_differential_equations
Loss of one degree of freedom in a three-dimensional, three-gimbal mechanism
rockets. Some coordinate systems in mathematics behave as if they were real gimbals used to measure the angles, notably Euler angles. For cases of three
Gimbal_lock
Czech academic and mathematician (1963–2022)
(1990) "On p-adic height pairings" (1991) Selmer complexes (2006) "The Euler system method for CM points on Shimura curves" (2007) "Eichler-Shimura relations
Jan_Nekovář
Telescope in the La Silla Observatory, Chile
Leonhard Euler Telescope, or the Swiss EULER Telescope, is a national, fully automatic 1.2-metre (47 in) reflecting telescope, built and operated by the
Swiss 1.2-metre Leonhard Euler Telescope
Swiss_1.2-metre_Leonhard_Euler_Telescope
Position of something in relation to its surroundings
to move the object from a reference placement to its current placement. Euler's rotation theorem shows that in three dimensions any orientation can be
Orientation_(geometry)
Formula for 3D vector rotation
In mathematics and mechanics, the Euler–Rodrigues formula describes the rotation of a vector in three dimensions. It is based on Rodrigues' rotation formula
Euler–Rodrigues_formula
Statistical model in quantum mechanics of magnetic materials
critical points and phase transitions of magnetic systems, in which the spins of the magnetic systems are treated quantum mechanically. It is related to
Quantum_Heisenberg_model
Geometric model of the physical space
intrinsic coordinate systems on a surface, beginning the theory of intrinsic geometry upon which modern geometric ideas are based. In 1760, Euler proved a theorem
Three-dimensional_space
Formulation of classical mechanics
taken by the system must be a critical point (often but not necessarily a local minimum) of the action functional. This leads to the Euler–Lagrange equations
Lagrangian_mechanics
Approaches for approximating solutions to differential equations
the forward Euler and backward Euler methods (see numerical ordinary differential equations) and compare the obtained schemes. Forward Euler method The
Explicit_and_implicit_methods
Theorem in algebraic number theory relating p-adic L-functions and ideal class groups
of the Mazur–Wiles theorem by using Thaine's method and Kolyvagin's Euler systems, described in Lang (1990) and Washington (1997), and later proved other
Main conjecture of Iwasawa theory
Main_conjecture_of_Iwasawa_theory
Herbrand–Ribet theorem Vandiver's conjecture Stickelberger's theorem Euler system p-adic L-function Arithmetic geometry Complex multiplication Abelian
List of algebraic number theory topics
List_of_algebraic_number_theory_topics
Property of certain dynamical systems
ellipsoids Harmonic oscillator Integrable Clebsch and Steklov systems in fluids Lagrange, Euler, and Kovalevskaya tops Neumann oscillator Two center Newtonian
Integrable_system
Stony background asteroid from the inner regions of the asteroid belt
2002 Euler is a stony background asteroid from the inner regions of the asteroid belt, approximately 17 kilometers (11 miles) in diameter. It was discovered
2002_Euler
Natural number
this number was proven by Leonhard Euler, who reported the proof in a letter to Daniel Bernoulli written in 1772. Euler used trial division, improving on
2,147,483,647
Operating system that behaves similarly to Unix
that has been certified, and EulerOS and Inspur K-UX are Linux distributions that have been certified. A few other systems (such as IBM z/OS) earned the
Unix-like
Force arising in rotating frame of reference
In classical mechanics, the Euler force is the fictitious tangential force that appears when a non-uniformly rotating reference frame is used for analysis
Euler_force
Result on the class group of certain number fields, strengthening Ernst Kummer's theorem
Ribet's converse to Herbrand's theorem, a consequence of the theory of Euler systems, can be found in Washington's book on cyclotomic fields. Ribet's methods
Herbrand–Ribet_theorem
Mathematical concept
Euler's "lucky" numbers are positive integers n such that for all integers k with 1 ≤ k < n, the polynomial k2 − k + n produces a prime number. When k
Lucky_numbers_of_Euler
Problem in physics and astronomy
In physics and astronomy, Euler's three-body problem is to solve for the motion of a particle that is acted upon by the gravitational field of two other
Euler's_three-body_problem
Counts 0s of a vector field on a differentiable manifold using its Euler characteristic
is the Euler characteristic of M {\displaystyle M} . A particularly useful corollary is when there is a non-vanishing vector field implying Euler characteristic
Poincaré–Hopf_theorem
Number divisible only by 1 and itself
the sum of two primes, in a 1742 letter to Euler. Euler proved Alhazen's conjecture (now the Euclid–Euler theorem) that all even perfect numbers can be
Prime_number
Biological system in animals and plants for gas exchange
Tables (Seventh ed.). Basle, Switzerland: Ciba-Geigy. pp. 257–258. Von Euler, U.S.; Liljestrand, G. (1946). "Observations on the pulmonary arterial blood
Respiratory_system
Natural number, composite number
the standard form. 40 is an abundant number. Swiss mathematician Leonhard Euler noted 40 prime numbers generated by the quadratic polynomial n 2 + n + 41
40_(number)
Study of objects of arithmetic interest over infinite towers of number fields
more elementary proof of the Mazur-Wiles theorem by using Kolyvagin's Euler systems, described in Lang (1990) and Washington (1997), and later proved other
Iwasawa_theory
Country in South Asia
most certainly I have never met his equal, and I can compare him only with Euler and Jacobi. He worked, far more than the majority of modern mathematicians
India
Special point on a modular curve in mathematics
Zhang & Zhang 2009). Kolyvagin later used Heegner points to construct Euler systems, and used this to prove much of the Birch–Swinnerton-Dyer conjecture
Heegner_point
Crater on the Moon
Euler is a lunar impact crater located in the southern half of the Mare Imbrium, and is named after the Swiss mathematician, physicist and astronomer
Euler_(crater)
Differential calculus on function spaces
Functions that maximize or minimize functionals may be found using the Euler–Lagrange equation of the calculus of variations. A simple example of such
Calculus_of_variations
Number equal to the sum of its proper divisors
Two millennia later, Leonhard Euler proved that all even perfect numbers are of this form. This is known as the Euclid–Euler theorem. It is not known whether
Perfect_number
Formulation of the principle of stationary action
equations for q(t) (the Euler–Lagrange equations), which may be derived as follows. Let q(t) represent the true evolution of the system between two specified
Hamilton's_principle
Family of Unix-like operating systems
at least two Linux distributions as qualifying for the Unix trademark, EulerOS and Inspur K-UX. Free software projects, although developed through collaboration
Linux
Human male external reproductive organ
Saddle River, New Jersey: Pearson Education, Inc. Bleske-Rechek, A. L.; Euler, H. A.; LeBlanc, G. J.; Shackelford, T. K.; Weekes-Shackelford, V. A. (2002)
Human_penis
Concept in classical mechanics
the Coriolis force, and, for non-uniformly rotating reference frames, the Euler force. Scientists in a rotating box can measure the rotation speed and axis
Rotating_reference_frame
Ways to represent 3D rotations
placement in space. According to Euler's rotation theorem, the rotation of a rigid body (or three-dimensional coordinate system with a fixed origin) is described
Rotation formulations in three dimensions
Rotation_formulations_in_three_dimensions
The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun. Most named objects in this list have a diameter
List_of_Solar_System_objects
Theorem in differential topology
sum of all of the indices at all of the zeros must be two, because the Euler characteristic of the 2-sphere is two. Therefore, there must be at least
Hairy_ball_theorem
Emden–Chandrasekhar equation Hénon–Heiles system Equation of motion Euler's rotation equations in rigid body dynamics Euler–Lagrange equation Beltrami identity
List of named differential equations
List_of_named_differential_equations
Equation used in demography
population growth, probably one of the most important equations is the Euler–Lotka equation. Based on the age demographic of females in the population
Euler–Lotka_equation
Ancient algorithm for generating prime numbers
Wheel Factorized basic sieve of Eratosthenes for practical sieving ranges. Euler's proof of the zeta product formula contains a version of the sieve of Eratosthenes
Sieve_of_Eratosthenes
Class of partial differential equations
These equations generalize classical mechanical systems, such as rigid body motion and ideal fluid flow (Euler equation), by interpreting their evolution as
Euler–Arnold_equation
Italian-French scientist (1736–1813)
mechanics. In 1766, on the recommendation of Leonhard Euler and d'Alembert, Lagrange succeeded Euler as the director of mathematics at the Prussian Academy
Joseph-Louis_Lagrange
Branch of mathematics
17th century envisioned the geometria situs and analysis situs. Leonhard Euler's Seven Bridges of Königsberg problem and polyhedron formula are arguably
Topology
Number, approximately 3.14
"Estimating π" (PDF). How Euler Did It. Reprinted in How Euler Did Even More. Mathematical Association of America. 2014. pp. 109–118. Euler, Leonhard (1755).
Pi
Integer having a non-trivial divisor
Euler diagram of numbers under 100: Abundant Primitive abundant Highly abundant Superabundant and highly composite Colossally abundant
Composite_number
Odd composite number which passes the given congruence
In mathematics, an odd composite integer n is called an Euler pseudoprime to base a, if a and n are coprime, and a ( n − 1 ) / 2 ≡ ± 1 ( mod n ) {\displaystyle
Euler_pseudoprime
Triangle center associated with the nine-point circle
triangle's three vertices and its orthocenter. The Euler lines of the four triangles formed by an orthocentric system (a set of four points such that each is the
Nine-point_center
Tool to study dynamic behavior of interconnected rigid or flexible bodies
simplest bodies or elements of a multibody system were treated by Newton (free particle) and Euler (rigid body). Euler introduced reaction forces between bodies
Multibody_system
Mathematical expression with disputed status
branch of log z defined at z = 0, let alone in a neighborhood of 0. In 1752, Euler in Introductio in analysin infinitorum wrote that a0 = 1 and explicitly
Zero_to_the_power_of_zero
Mathematical function
In mathematics, the beta function, also called the Euler integral of the first kind, is a special function that is closely related to the gamma function
Beta_function
EulerOS NestOS - open-source cloud based operating system based on EulerOS, contributed by openEuler community NuttX - a Unix/Linux-like RTOS for Microcontrollers)
List_of_operating_systems
Wobble of the axis of rotation
the second Euler angle. If it is not caused by forces external to the body, it is called free nutation or Euler nutation (after Leonhard Euler). A pure
Nutation
EULER SYSTEM
EULER SYSTEM
Boy/Male
British, English
Wheel Ruler; Circle Ruler
Boy/Male
Muslim
Ruler
Boy/Male
German
Powerful Ruler; Army Ruler
Boy/Male
German, Teutonic
Hardworking Ruler; Home Ruler
Boy/Male
Indian
Ruler
Boy/Male
American, Chinese, Christian, Danish, French, German, Norse, Scandinavian, Swedish
Ruler; Ruler of the People; Peaceful Ruler; All-ruler; Forever; Alone; Ever Ruler
Boy/Male
German, Swedish
Ever Ruler; Island Ruler
Boy/Male
American, Czech, Danish, French, German, Scandinavian, Swedish
Honourable Ruler; Peaceful Ruler; All Ruler; Ever Ruler
Boy/Male
Australian, Dutch, French, German, Italian, Latin, Swiss
Powerful Ruler; Dominant Ruler
Boy/Male
American, Anglo, British, Christian, English, German
Wealthy Ruler; Rich Ruler
Boy/Male
French, German, Irish
Dominant Ruler; Powerful Ruler
Boy/Male
Indian
Ruler
Boy/Male
Christian, German, Teutonic
Hard Working Ruler; Industrious Ruler; Home Ruler
Boy/Male
French, German
Wise Ruler; Old Ruler; Long Term Ruler
Boy/Male
Christian, German, Norse, Polish, Scandinavian, Swedish
Peaceful Ruler; Forever; Alone; Ruler; All-ruler
Boy/Male
Indian
Ruler
Boy/Male
Danish, German, Swedish
Island Ruler; Ever Ruler
Boy/Male
American, British, English
Royal Ruler; King's Ruler
Boy/Male
Muslim
Ruler
Boy/Male
American, Australian, Danish, German
Powerful Ruler; Dominant Ruler
EULER SYSTEM
EULER SYSTEM
Boy/Male
Hindu
Scion of raghakula race
Girl/Female
English French
Medieval male name adopted as a feminine name.
Boy/Male
Australian, Celtic, Finnish, Indonesian
Bear; Rock; Thor; The Eagle; Money; Diminutive of Arthur
Girl/Female
Hindu
Of the mountains, Goddess Durga
Boy/Male
Spanish American
Abbreviation of the Hebrew name Jehoichin meaning 'Jehovah has established.' Joaquin Miller the...
Surname or Lastname
English and French
English and French : from the personal name (Latin Vivianus, a derivative of vivus ‘living’, ‘alive’). The name was borne by a 5th-century bishop of Saintes, France, and was popular among the Normans, by whom it was introduced to England.
Girl/Female
Hindu
Affection
Male
Chinese
virtuous order.
Boy/Male
American, Anglo, Australian, British, Chinese, Christian, Danish, Dutch, English, Finnish, French, German, Indian, Netherlands, Scandinavian, Scottish, Swedish, Swiss
Rules with Good Judgement; Counsel Power; Ruler with Counsel; Mighty; Well-advised Ruler; Powerful Might; Wise Ruler; Powerful
Boy/Male
Tamil
Chirantan | சிரஂதநÂ
Immortal
EULER SYSTEM
EULER SYSTEM
EULER SYSTEM
EULER SYSTEM
EULER SYSTEM
n.
A chief ruler; a potentate. [Obs.] Wyclif.
n.
A straight or curved strip of wood, metal, etc., with a smooth edge, used for guiding a pen or pencil in drawing lines. Cf. Rule, n., 7 (a).
n.
A ruler or governor.
n.
The mother and ruler of a family or of her descendants; a ruler by maternal right.
n.
A Mohammedan title for a ruler; a judge.
n.
A ruler of one division of a heptarchy.
n.
A ruler; a governor; a prince.
n.
A ruler, or sovereign, of a Mohammedan state; specifically, the ruler of the Turks; the Padishah, or Grand Seignior; -- officially so called.
n.
A sole or supreme ruler; a sovereign; the highest ruler; an emperor, king, queen, prince, or chief.
a.
A suffix meaning a ruler, as in monarch (a sole ruler).
n.
One who pules; one who whines or complains; a weak person.
n.
A system of government in which the chief ruler is a monarch.
n.
A joint regent or ruler.
a.
The office of ruler; rule; authority; government.
a.
One who rules or reigns; a governor; a ruler.
n.
A petty king; a ruler of little power or consequence.
n.
A long, flexble piece of wood sometimes used as a ruler.
a.
Pertaining to Euler, a German mathematician of the 18th century.
n.
A ruler or ruling power.
n.
One who rules; one who exercises sway or authority; a governor.