Dec 3, 2017 · Lag is essentially delay. Just as correlation shows how much two timeseries are similar, autocorrelation describes how similar the time series is with itself. Consider a discrete sequence of …

Dec 30, 2021 · From the paper, and the paper's title even "ZERO LAG (well, almost)", the adaptive filter described in the paper is not exactly 0 0 lag. The adaptive filter algorithm is designed to provide a …

I am trying to compute the derivative of an experimentally-measured quantity as a function of time. The data are fairly noisy, which causes problems. For instance, using finite differences (central

1 day ago · Mathematics Stack Exchange is a platform for asking and answering questions on mathematics at all levels.

Feb 16, 2026 · I just want to clarify some terminology. Let $(X,\\Vert \\cdot\\Vert_X)$, $(Y,\\Vert \\cdot\\Vert_Y)$ be normed linear spaces. Let $T:X\\to Y$ be some arbitrary ...

May 20, 2019 · I am a bit confused about the relation between the Pearson Correlation Coefficient (with time-lag) and Cross-Correlation. I used to think that Cross-Correlation IS the Pearson Correlation …

Feb 15, 2026 · Notation: Pochhammer symbol (x)n = Γ(x+n) Γ(x) (x) n = Γ (x + n) Γ (x), Generalized Harmonic numbers H(r) n = ∑ k=1n 1 kr H n (r) = ∑ k = 1 n 1 k r. Context: I tried to decompose ∑ k≥1 …

Feb 15, 2026 · Here is a problem in category theory I need help. Let $\\mathcal{C}$ and $\\mathcal{D}$ be locally small categories and $G:\\mathcal{D}\\to \\mathcal{C}$ be a functor ...

Feb 10, 2026 · Let $X$ and $Y$ be normed linear spaces and let $T: X \to Y$ be a linear map. Suppose that $T (X)$ is finite dimensional and the graph of $T$ is closed. Prove that $T ...

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