Proving a time series is stationary
64621
Calculate mean and autocovariance function to check stationarity
81243
Martingale theory to show f(x+s) = f(x)
9357
Time series modeling with high-frequency data
18862
Autocorrelation vs Non-stationary
149895
A more convenient Fourier series
66500
Proving that orthogonal vectors are linearly independent
142594
Verifying the interpretation of stopping times and stopping time $\sigma$-algebras
34031
Modelling Time Series of percentages
91744
Proving sum of sines is periodic when ratio of their frequencies is rational using differentation
112491
Finding counterexamples for infinite series.
154668
Is there any gold standard for modeling irregularly spaced time series?
43536
Proof that a standard Brownian motion visits zero infinitely often at the beginning
154406
Real analysis - proof approach help
15327
Vector autoregression for mix of stationary and nonstationary variables
73189
Proving Bernoulli is the limit of Beta
83778
An incorrect proof by exhaustion
100473
Prove convergence of series