equation of the first (or second etc ) order {{Mathematics}} - meaning and definition. What is equation of the first (or second etc ) order {{Mathematics}}
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What (who) is equation of the first (or second etc ) order {{Mathematics}} - definition

First-order election; First-order elections; Second-order elections; Second order election; First order election

Second-order logic         
  • [[Graffiti]] in [[Neukölln]] (Berlin) showing the simplest second-order sentence admitting nontrivial models, "∃φ φ".
EXTENSION OF FIRST-ORDER LOGIC ALLOWING QUANTIFICATION OVER FUNCTIONS AND RELATIONS
Second order logic; Second Order Logical Language; Second Order Logic; Second-order predicate calculus; Second order predicate calculus; Henkin model; Existential second-order logic; Henkin semantics; Monadic second order; History of second-order logic; Semantics of second-order logic
In logic and mathematics, second-order logic is an extension of first-order logic, which itself is an extension of propositional logic.Shapiro (1991) and Hinman (2005) give complete introductions to the subject, with full definitions.
Examples of differential equations         
MATHEMATICAL EQUATION INVOLVING DERIVATIVES OF AN UNKNOWN FUNCTION
Examples of differential equations; Differential equations/Examples; Differential equations of mathematical physics; Differential equations from Mathematical Physics; Differential equations from outside physics; Differental equations; Diff eq; Differential Equations; DiffyEq; Diffyeq; Separable ordinary differential equation; Exact first-order ordinary differential equation; Order (differential equation); Diff eq'n; Diffeq; Second order equation; Differential equations; Second-order differential equation; Higher order differential equation; Degree of a differential equation; Solutions of differential equations; Types of differential equations; Applications of differential equations; Differential Equation; History of differential equations; Differential equation solvers; Order of differential equation
Differential equations arise in many problems in physics, engineering, and other sciences. The following examples show how to solve differential equations in a few simple cases when an exact solution exists.
Differential equation         
MATHEMATICAL EQUATION INVOLVING DERIVATIVES OF AN UNKNOWN FUNCTION
Examples of differential equations; Differential equations/Examples; Differential equations of mathematical physics; Differential equations from Mathematical Physics; Differential equations from outside physics; Differental equations; Diff eq; Differential Equations; DiffyEq; Diffyeq; Separable ordinary differential equation; Exact first-order ordinary differential equation; Order (differential equation); Diff eq'n; Diffeq; Second order equation; Differential equations; Second-order differential equation; Higher order differential equation; Degree of a differential equation; Solutions of differential equations; Types of differential equations; Applications of differential equations; Differential Equation; History of differential equations; Differential equation solvers; Order of differential equation
In mathematics, a differential equation is an equation that relates one or more unknown functions and their derivatives. In applications, the functions generally represent physical quantities, the derivatives represent their rates of change, and the differential equation defines a relationship between the two.

Wikipedia

Second-order election

Second-order election is a term that appeared for the first time in Karlheinz Reif and Hermann Schmitt's "Nine second-order national elections – A conceptual framework for the analysis of European election results" article for the [European Journal of Political Research, in 1980]. It was used to analyze the first European Parliament elections, held in 1979 in the, then, nine member states of the European Economic Community. According to the "second-order elections" approach, European Parliament elections were "second-order" in that they were viewed as less important by voters, parties and the media than first-order elections.

First-order elections are those that determine the government and/or executive power in a political system, i.e., national elections. They are first-order in that they are seen as more important by parties, voters and the media. Local and regional elections are also considered second-order elections.

Second-order elections present the following characteristics: turnout is expected to be lower than in national elections, voters are more prone to vote for protest parties, or parties in the periphery of the political system, rather than the usual mainstream parties they would vote for in a national election. As a result, second-order elections are often used by voters to punish or reward the current governing parties.

Regarding EP elections, empirical evidence has shown that all six EP elections (1979, 1985, 1989, 1994, 1999, 2004) have been second-order elections. However, the second-order elections approach has not been confirmed for the twelve new member states of the European Union (Bulgaria, Czech Republic, Cyprus, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Romania, Slovakia, Slovenia).