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Jul
2
awarded  Curious
Jun
27
reviewed Approve suggested edit on How to prove that a limit is wrong using Epsilon-Delta definition?
Jun
27
reviewed Approve suggested edit on upper bound for error in multivariable differential
May
28
reviewed Approve suggested edit on Solving exponential equations using logarithms
May
23
comment Kolmogorov theorem
@kaciou : For a full proof of this theorem you should take a look à Karatzas and Shreve book "Brownian Motion and Stochastic Calculus". Regards
May
23
reviewed Approve suggested edit on Boundary Value Problem$ 5U_x+2U_y=(x-y)^2$
May
23
reviewed Approve suggested edit on Planar graph proof
May
16
comment Combination of Wiener Processes
You should note first that the law of the Euclidian norm of a multidimensional Brownian Motion is invariant under rotation and second try to determine this law.Best regards
May
9
reviewed Approve suggested edit on A problem about ideals and isomorphism
May
9
reviewed Approve suggested edit on Random convex shapes containing a ball
May
6
reviewed Reject suggested edit on Choosing a password with constraints
May
2
reviewed Approve suggested edit on Is this exponential equation solvable? natural logarithms, exponential
May
2
reviewed Approve suggested edit on Theorem of Galvin, Mycielski and Solovay
Apr
30
reviewed Approve suggested edit on Roots of a cubic expression and arithmetic progression
Apr
26
reviewed Approve suggested edit on Uniform convergence of sequence of partial sums.Help please
Apr
26
reviewed Reject suggested edit on How to calculated the integral of the area $C$ of $\mathbf{F}\cdot d\textbf{r}$?
Apr
26
reviewed Approve suggested edit on What is the 3SAT problem?
Apr
26
comment Linear combinations of Ito processes
So you are looking for the solution of the following problem : Find all $(X_1,X_2)$ such that :1/the image by any endomorphism is a vector such that the coordinates are either Brownian motion or Ornstein-Uhhenbeck process 2/ such that $X_1,X_2$ are Itô processes. Right ?
Apr
25
comment Linear combinations of Ito processes
Your statement simply doesn't make sense you need to be more precise about processes $X_t^1$ and $X_t^2$ otherwise the conclusion is trivially false. Best regards
Apr
23
comment Clark-Ocone Formula
I am not so sure about theoretical results that are implied by Clark Ocone's Formula, I would say its main interest is to give a precise formulation to the martingale representation theorems that are available and which are "not " "constructive" results. In this regard it is an accomplishment of its own and it is not applicable to the only field of finance, the condition though is to be able to determine the Malliavin derivative ant is conditional expectation. Best regards