Meaning of "$\stackrel{p}\longrightarrow$" in math notation (arrow with a p over it) I have a problem with the concept of a symbol (an arrow with a P over it). Can anyone clarify this for me? For example what the symbol means in this relationship:
$$\large Y_t^{(n)} \stackrel{p}\longrightarrow y(t)$$

It means convergence in probability. In your case, it's about random processes rather than random variables. It says that the series of random processes will converge towards a single random process.
