Euler equations, Mathematics

Assignment Help:

Euler Equations - Series Solutions to Differential Equations

In this section we require to look for solutions to,

ax2 y′′ + bxy′ + cy = 0

around x0  = 0. These kinds of differential equations are termed as Euler Equations.

Recall from the earlier section which a point is an ordinary point if the quotients the quotients,

(bx)/(ax2) = (b/ax)                               and c/(ax2)

Above equations have Taylor series around x0 = 0. Though, due to the x in the denominator neither of these will contain a Taylor series around x0 = 0 and so x0 = 0 is a particular point.  Therefore, the method from the earlier section won't work as it needed an ordinary point.

Though, this is possible to find solutions to this differential equation that aren't series solutions. Here we start off through assuming that x>0 (the purpose for it will be apparent after we work the first illustration) and which all solutions are of the form,

y (x) = xr    ............... (2)

 Here plug this in the differential equation to find,

ax2(r)(r-1) xr-2 + bx (r) xr-1 + cxr = 0

ar(r-1) xr + b(r) xr + cxr = 0

(ar(r-1) + b(r) + c)xr = 0

Now, we assumed that x>0 and so this will only be zero if,

ar ( r -1) + b (r) +  c = 0   ...................       (3)

Therefore, solutions will be of the form (2) given r is a solution to (3). That equation is a quadratic in r and thus we will have three cases to look at: Distinct Roots, Real and Double Roots and Quadratic Roots.


Related Discussions:- Euler equations

Functions, The figure shows the sketch graphs of the functions

The figure shows the sketch graphs of the functions

GEOMETRY, DIFFERENCE BETWEEN RIGHT ANGLE AND SCALENE

DIFFERENCE BETWEEN RIGHT ANGLE AND SCALENE

Evaluate the inverse function , Question: a. What is the inverse of f (...

Question: a. What is the inverse of f (x)? b. Graph the inverse function from part (a). c. Rewrite the inverse function from part (a) in exponential form. d. Evaluate

Spurious correlations, Spurious Correlations - in several rare situati...

Spurious Correlations - in several rare situations when plotting the data for x and y we may have a group indicating either positive correlation or negative (-ve) correlation

Utilizes the infinite definition of the limit to prove limit, Utilizes the ...

Utilizes the definition of the limit to prove the given limit. Solution Let M > 0 be any number and we'll have to choose a δ > 0 so that, 1/ x 2   > M

What is congruent angles in parallel lines, What is Congruent Angles in Par...

What is Congruent Angles in Parallel Lines ? Postulate 4.1 (The Parallel Postulate) Through a given point not on a line there is exactly one line parallel to the line. T

Example of integrals involving trig functions, Example of Integrals Involvi...

Example of Integrals Involving Trig Functions Example: Estimate the following integral. ∫ sin 5 x dx Solution This integral no longer contains the cosine in it that

Mr F.D, how you divide 100 by 10 and then x by 10

how you divide 100 by 10 and then x by 10

Find the area of parallelogram, Find the area of PARALLELOGRAM ? A para...

Find the area of PARALLELOGRAM ? A parallelogram is a four-sided shape, of which the opposite sides are parallel. (Because they are parallel, opposite sides also have the same

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd