सभी किताबें

पेशेवर

ऐप्स परिचय Coach लॉग इन पढ़ना शुरू करें

Quantitative Finance · शब्दावली

Stochastic differential equation, strong and weak solutions क्या है?

अन्य नाम: stochastic differential equation · strong solution · weak solution

Definition 4.1 Quantitative Methods · अध्याय 4 — Stochastic Differential Equations

A stochastic differential equation is

dXt=μ(t,Xt) dt+σ(t,Xt) dWt,X0=x0,dX_t = \mu(t, X_t)\,dt + \sigma(t, X_t)\,dW_t, \qquad X_0 = x_0,

for measurable μ,σ\mu, \sigma. A strong solution on a given probability space with a given Brownian motion WW is an adapted continuous process with Xt=x0+∫0tμ(s,Xs) ds+∫0tσ(s,Xs) dWsX_t = x_0 + \int_0^t\mu(s, X_s)\,ds + \int_0^t\sigma(s, X_s)\,dW_s. A weak solution is a pair (X,W)(X, W) on some filtered probability space satisfying the equation: the Brownian motion is part of the answer.

अध्याय में पढ़ें →