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Text of the page (random words):
s in which a solution exists given any point a b displaystyle a b in the xy plane define some rectangular region z displaystyle z such that z l m n p displaystyle z l m times n p and a b displaystyle a b is in the interior of z displaystyle z if we are given a differential equation d y d x g x y displaystyle frac dy dx g x y and the condition that y b displaystyle y b when x a displaystyle x a then there is locally a solution to this problem if g x y displaystyle g x y and g x displaystyle frac partial g partial x are both continuous on z displaystyle z this solution exists on some interval with its center at a displaystyle a the solution may not be unique see ordinary differential equation for other results however this only helps us with first order initial value problems suppose we had a linear initial value problem of the nth order f n x d n y d x n f 1 x d y d x f 0 x y g x displaystyle f_ n x frac d n y dx n cdots f_ 1 x frac dy dx f_ 0 x y g x such that y x 0 y 0 y x 0 y 0 y x 0 y 0 displaystyle y x_ 0 y_ 0 y x_ 0 y _ 0 y x_ 0 y _ 0 ldots for any nonzero f n x displaystyle f_ n x if f 0 f 1 displaystyle f_ 0 f_ 1 ldots and g displaystyle g are continuous on some interval containing x 0 displaystyle x_ 0 y displaystyle y is unique and exists 14 related concepts edit a delay differential equation dde is an equation for a function of a single variable usually called time in which the derivative of the function at a certain time is given in terms of the values of the function at earlier times an integro differential equation ide is an equation that combines aspects of a differential equation and an integral equation a stochastic differential equation sde is an equation in which the unknown quantity is a stochastic process and the equation involves some known stochastic processes for example the wiener process in the case of diffusion equations a stochastic partial differential equation spde is an equation that generalizes sdes to include space time noise processes with applications in quantum field theory and statistical mechanics an ultrametric pseudo differential equation is an equation which contains p adic numbers in an ultrametric non archimedean space mathematical models that involve ultrametric pseudo differential equations use pseudo differential operators instead of differential operators a differential algebraic equation dae is a differential equation comprising differential and algebraic terms given in implicit form connection to difference equations edit see also time scale calculus the theory of differential equations is closely related to the theory of difference equations in which the coordinates assume only discrete values and the relationship involves values of the unknown function or functions and values at nearby coordinates many methods to compute numerical solutions of differential equations or study the properties of differential equations involve the approximation of the solution of a differential equation by the solution of a corresponding difference equation applications edit the study of differential equations is a wide field in pure and applied mathematics physics and engineering all of these disciplines are concerned with the properties of differential equations of various types pure mathematics focuses on the existence and uniqueness of solutions while applied mathematics emphasizes the rigorous justification of the methods for approximating solutions differential equations play an important role in modeling virtually every physical technical or biological process from celestial motion to bridge design to interactions between neurons differential equations such as those used to solve real life problems may not necessarily be directly solvable i e do not have closed form solutions instead solutions can be approximated using numerical methods many fundamental laws of physics and chemistry can be formulated as differential equations in biology and economics differential equations are used to model the behavior of complex systems the mathematical theory of differential equations first developed together with the sciences where the equations had originated and where the results found application however diverse problems sometimes originating in quite distinct scientific fields may give rise to identical differential equations whenever this happens mathematical theory behind the equations can be viewed as a unifying principle behind diverse phenomena as an example consider the propagation of light and sound in the atmosphere and of waves on the surface of a pond all of them may be described by the same second order partial differential equation the wave equation which allows us to think of light and sound as forms of waves much like familiar waves in the water conduction of heat the theory of which was developed by joseph fourier is governed by another second order partial differential equation the heat equation it turns out that many diffusion processes while seemingly different are described by the same equation the black scholes equation in finance is for instance related to the heat equation the number of differential equations that have received a name in various scientific areas is a witness of the importance of the topic see list of named differential equations software edit some cas software can solve differential equations these cas software and their commands are worth mentioning maple 15 dsolve mathematica 16 dsolve maxima 17 ode2 equation y x sagemath 18 desolve sympy 19 sympy solvers ode dsolve equation xcas 20 desolve y k y y see also edit exact differential equation functional differential equation initial condition integral equations numerical methods for ordinary differential equations numerical methods for partial differential equations picard lindelöf theorem on existence and uniqueness of solutions recurrence relation also known as difference equation abstract differential equation system of differential equations references edit dennis g zill 15 march 2012 a first course in differential equations with modeling applications cengage learning isbn 978 1 285 40110 2 newton isaac c 1671 methodus fluxionum et serierum infinitarum the method of fluxions and infinite series published in 1736 opuscula 1744 vol i p 66 bernoulli jacob 1695 explicationes annotationes additiones ad ea quae in actis sup de curva elastica isochrona paracentrica velaria hinc inde memorata paratim controversa legundur ubi de linea mediarum directionum alliisque novis acta eruditorum hairer ernst nørsett syvert paul wanner gerhard 1993 solving ordinary differential equations i nonstiff problems berlin new york springer verlag isbn 978 3 540 56670 0 frasier craig july 1983 review of the evolution of dynamics vibration theory from 1687 to 1742 by john t cannon and sigalia dostrovsky pdf bulletin of the american mathematical society new series 9 1 wheeler gerard f crummett william p 1987 the vibrating string controversy am j phys 55 1 33 37 bibcode 1987amjph 55 33w doi 10 1119 1 15311 for a special collection of the 9 groundbreaking papers by the three authors see first appearance of the wave equation d alembert leonhard euler daniel bernoulli the controversy about vibrating strings archived 2020 02 09 at the wayback machine retrieved 13 nov 2012 herman hj lynge and son for de lagrange s contributions to the acoustic wave equation can consult acoustics an introduction to its physical principles and applications allan d pierce acoustical soc of america 1989 page 18 retrieved 9 dec 2012 speiser david discovering the principles of mechanics 1600 1800 p 191 basel birkhäuser 2008 fourier joseph 1822 théorie analytique de la chaleur in french paris firmin didot père et fils oclc 2688081 boyce william e diprima richard c 1967 elementary differential equations and boundary value problems 4th ed john wiley sons p 3 weisstein eric w ordinary differential equation order from mathworld a wolfram web resource http mathworld wolfram com ordinarydifferentialequationorder html order and degree of a differential equation archived 2016 04 01 at the wayback machine accessed dec 2015 zill dennis g 2001 a first course in differential equations 5th ed brooks cole isbn 0 534 37388 7 dsolve maple programming help www maplesoft com retrieved 2020 05 09 dsolve wolfram language documentation www wolfram com retrieved 2020 06 28 schelter william f gaertner boris ed differential equations symbolic solutions the computer algebra program maxima a tutorial in maxima documentation on sourceforge archived from the original on 2022 10 04 basic algebra and calculus sage tutorial v9 0 doc sagemath org retrieved 2020 05 09 ode sympy 1 11 documentation 2022 08 22 archived from the original on 2022 09 26 symbolic algebra and mathematics with xcas pdf further reading edit abbott p neill h 2003 teach yourself calculus pp 266 277 blanchard p devaney r l hall g r 2006 differential equations thompson boyce w diprima r meade d 2017 elementary differential equations and boundary value problems wiley coddington e a levinson n 1955 theory of ordinary differential equations mcgraw hill ince e l 1956 ordinary differential equations dover johnson w 1913 a treatise on ordinary and partial differential equations john wiley and sons in university of michigan historical math collection polyanin a d zaitsev v f 2003 handbook of exact solutions for ordinary differential equations 2nd ed boca raton chapman hall crc press isbn 1 58488 297 2 porter r i 1978 xix differential equations further elementary analysis teschl gerald 2012 ordinary differential equations and dynamical systems providence american mathematical society isbn 978 0 8218 8328 0 daniel zwillinger 12 may 2014 handbook of differential equations elsevier science isbn 978 1 4832 6396 0 external links edit wikiquote has quotations related to differential equation wikibooks has a book on the topic of ordinary differential equations wikiversity has learning resources about differential equations wikisource has the text of the 1911 encyclopædia britannica article differential equation media related to differential equations at wikimedia commons lectures on differential equations mit open courseware videos online notes differential equations paul dawkins lamar university differential equations s o s mathematics introduction to modeling via differential equations introduction to modeling by means of differential equations with critical remarks mathematical assistant on web symbolic ode tool using maxima exact solutions of ordinary differential equations collection of ode and dae models of physical systems matlab models notes on diffy qs differential equations for engineers an introductory textbook on differential equations by jiri lebl of uiuc khan academy video playlist on differential equations topics covered in a first year course in differential equations mathdiscuss video playlist on differential equations v t e mathematics history timeline outline lists glossary foundations category theory information theory mathematical logic philosophy of mathematics set theory type theory algebra abstract commutative elementary group theory linear multilinear universal homological analysis calculus real analysis complex analysis hypercomplex analysis differential equations functional analysis harmonic analysis measure theory discrete combinatorics graph theory order theory geometry algebraic analytic arithmetic differential discrete euclidean finite number theory arithmetic algebraic number theory analytic number theory diophantine geometry topology general algebraic differential geometric homotopy theory applied engineering mathematics mathematical biology mathematical chemistry mathematical economics mathematical finance mathematical physics mathematical psychology mathematical sociology mathematical statistics probability statistics systems science control theory game theory operations research computational computer science theory of computation computational complexity theory numerical analysis optimization computer algebra related topics informal mathematics recreational mathematics mathematics and art mathematics education mathematics portal category commons wikiproject v t e differential equations classification operations differential operator notation for differentiation ordinary partial differential algebraic integro differential fractional linear non linear holonomic attributes of variables dependent and independent variables homogeneous nonhomogeneous coupled decoupled order degree autonomous exact differential equation on jet bundles relation to processes difference discrete analogue stochastic stochastic partial delay solutions existence uniqueness picard lindelöf theorem peano existence theorem carathéodory s existence theorem cauchy kowalevski theorem solution topics wronskian phase portrait phase space lyapunov stability asymptotic stability exponential stability rate of convergence series solutions integral solutions numerical integration dirac delta function solution methods inspection separation of variables method of undetermined coefficients variation of parameters integrating factor integral transforms euler method finite difference method crank nicolson method runge kutta methods finite element method finite volume method galerkin method perturbation theory applications list of named differential equations mathematicians isaac newton gottfried wilhelm leibniz leonhard euler jacob bernoulli émile picard józef maria hoene wroński ernst lindelöf rudolf lipschitz joseph louis lagrange augustin louis cauchy john crank phyllis nicolson carl david tolmé runge martin kutta sofya kovalevskaya v t e major topics in mathematical analysis calculus integration differentiation differential equations ordinary partial stochastic fundamental theorem of calculus calculus of variations vector calculus tensor calculus matrix calculus lists of integrals table of derivatives real analysis complex analysis hypercomplex analysis quaternionic analysis functional analysis fourier analysis least squares spectral analysis harmonic analysis p adic analysis p adic numbers measure theory representation theory functions continuous function special functions limit series infinity mathematics portal authority control national libraries france data germany israel united states japan czech republic retrieved from https en wikipedia org w index php title differential_equation oldid 1114119790 categories differential equations hidden categories webarchive template wayback links cs1 french language sources fr articles with short description short description is different from wikidata commons category link is on wikidata articles with bnf identifiers articles with gnd identifiers articles with j9u identifiers articles with lccn identifiers articles with ndl identifiers articles with nkc identifiers navigation menu personal tools not logged in talk contributions create account log in 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