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In mathematics, a linear differential equation is a differential equation that is defined by a linear polynomial in the unknown function and its derivatives, that is an equation of the form + ′ + ″ + () = where a 0 (x), ..., a n (x) and b(x) are arbitrary differentiable functions that do not need to be linear, and y′, ..., y (n) are the successive derivatives of an unknown function y of ...
An ordinary differential equation (ODE) is an equation containing an unknown function of one real or complex variable x, its derivatives, and some given functions of x. The unknown function is generally represented by a variable (often denoted y), which, therefore, depends on x. Thus x is often called the independent variable of the equation.
In mathematics, the characteristic equation (or auxiliary equation[1]) is an algebraic equation of degree n upon which depends the solution of a given nth- order differential equation [2] or difference equation. [3][4] The characteristic equation can only be formed when the differential or difference equation is linear and homogeneous, and has ...
Differential equations. In mathematics, a differential-algebraic system of equations (DAE) is a system of equations that either contains differential equations and algebraic equations, or is equivalent to such a system. The set of the solutions of such a system is a differential algebraic variety, and corresponds to an ideal in a differential ...
In mathematics, an ordinary differential equation is called a Bernoulli differential equation if it is of the form. where is a real number. Some authors allow any real , [1][2] whereas others require that not be 0 or 1. [3][4] The equation was first discussed in a work of 1695 by Jacob Bernoulli, after whom it is named.
Teaching. Teaching English as a second language. v. t. e. Sri Lankan English (SLE) is the English language as it is used in Sri Lanka, a term dating from 1972. [1] Sri Lankan English is principally categorised as the Standard Variety and the Nonstandard Variety, which is called as "Not Pot English". The classification of SLE as a separate ...
A differential system is a means of studying a system of partial differential equations using geometric ideas such as differential forms and vector fields. For example, the compatibility conditions of an overdetermined system of differential equations can be succinctly stated in terms of differential forms (i.e., for a form to be exact, it ...
A differential equation can be homogeneous in either of two respects. A first order differential equation is said to be homogeneous if it may be written. where f and g are homogeneous functions of the same degree of x and y. [1] In this case, the change of variable y = ux leads to an equation of the form. which is easy to solve by integration ...