Stochastic Differential Equation

Click For Summary
SUMMARY

The discussion focuses on solving the stochastic differential equation (SDE) defined as dX_t = [1/X_t] dt + aX_t dB_t. The participant identifies that this SDE is non-linear and not covered in their elementary stochastic calculus course, which primarily dealt with general linear SDEs. They suggest that the equation may be reducible to a linear SDE through the substitution Z_{t} = X^{2}_{t}, indicating a potential pathway for solution.

PREREQUISITES
  • Understanding of stochastic calculus principles
  • Familiarity with stochastic differential equations
  • Knowledge of linear vs. non-linear SDEs
  • Experience with Itô's lemma and stochastic processes
NEXT STEPS
  • Research the method of substituting variables in stochastic differential equations
  • Study Itô's lemma for non-linear SDEs
  • Learn about the classification of SDEs and their solutions
  • Explore advanced topics in stochastic calculus, particularly non-linear SDEs
USEFUL FOR

Students and researchers in mathematics or finance, particularly those focused on stochastic processes and differential equations.

hzzhangyu
Messages
2
Reaction score
0

Homework Statement



How to solve this SDE?

dX_t = [1/X_t] dt + aX_t dB_t

Homework Equations





The Attempt at a Solution



If I didnt get it wrong, this is not a general linear SDE, and my course in elementary stochastic calcus did not cover SDEs other than the general linear ones. Thanks for the help!
 
Physics news on Phys.org
It definitely looks non-linear, but it might be reducible into a linear SDE.
 
Try the substitution

<br /> Z_{t} = X^{2}_{t}<br />
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 3 ·
Replies
3
Views
1K
Replies
18
Views
4K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
1
Views
2K
Replies
2
Views
1K