There are a number of equations known as the Riccati differential equation. The most common is
![z^2w^('')+[z^2-n(n+1)]w=0](/images/equations/RiccatiDifferentialEquation/NumberedEquation1.gif) |
(1)
|
(Abramowitz and Stegun 1972, p. 445; Zwillinger 1997, p. 126), which has solutions
 |
(2)
|
where and are spherical Bessel functions of the first and second kinds.
Another Riccati differential equation is
 |
(3)
|
which is solvable by algebraic, exponential, and logarithmic functions only when , for , 1, 2, ....
Yet another Riccati differential equation is
 |
(4)
|
where (Boyce and DiPrima 1986, p. 87).
The transformation
 |
(5)
|
leads to the second-order linear homogeneous equation
![R(z)y^('')-[R^'(z)+Q(z)R(z)]y^'+[R(z)]^2P(z)y=0.](/images/equations/RiccatiDifferentialEquation/NumberedEquation6.gif) |
(6)
|
If a particular solution to (4) is known, then a more general solution containing a single
arbitrary constant can be obtained from
 |
(7)
|
where is a solution to the first-order
linear equation
![v^'=-[Q(z)+2R(z)w_1(z)]v-R(z)](/images/equations/RiccatiDifferentialEquation/NumberedEquation8.gif) |
(8)
|
(Boyce and DiPrima 1986, p. 87). This result is due to Euler (1760).
Abramowitz, M. and Stegun, I. A. (Eds.). "Riccati-Bessel Functions." §10.3 in Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical
Tables, 9th printing. New York: Dover, p. 445, 1972.
Bender, C. M. and Orszag, S. A. §1.6 in Advanced Mathematical Methods for Scientists and Engineers.
New York: McGraw-Hill, 1978.
Boyce, W. E. and DiPrima, R. C. Elementary Differential Equations and Boundary Value Problems,
4th ed. New York: Wiley, 1986.
Boyle, P. P.; Tian, W.; and Guan, F. "The Riccati Equation in Mathematical
Finance." J. Symb. Comput. 33, 343-355, 2002.
Glaisher, J. W. L. "On Riccati's Equation." Quart. J. Pure
Appl. Math. 11, 267-273, 1871.
Goldstein, M. E. and Braun, W. H. Advanced Methods for the Solution of Differential Equations.
NASA SP-316. Washington, DC: U.S. Government Printing Office, pp. 45-46, 1973.
Ince, E. L. Ordinary Differential Equations. New York: Dover, pp. 23-35
and 295, 1956.
Reid, W. T. Riccati Differential Equations. New York: Academic Press,
1972.
Simmons, G. F. Differential Equations with Applications and Historical Notes.
New York: McGraw-Hill, pp. 62-63, 1972.
Zwillinger, D. (Ed.). CRC Standard Mathematical Tables and Formulae. Boca Raton,
FL: CRC Press, p. 414, 1995.
Zwillinger, D. "Riccati Equation--1 and Riccati Equation--2." §II.A.75 and II.A.76 in Handbook of Differential Equations, 3rd ed. Boston, MA:
Academic Press, pp. 121 and 288-291, 1997.
|