Integration by parts - Wikipedia
https://en.wikipedia.org/wiki/Integration_by_partsConsidering a second derivative of in the integral on the LHS of the formula for partial integration suggests a repeated application to the integral on the RHS: Extending this concept of repeated partial integration to derivatives of degree n leads to This concept may be useful when the successive integrals of are readily available (e.g., plain exponentials or sine and cosine, as in Laplace or Fourier transforms), and when the nth derivative …
Partial and Semipartial Correlation
faculty.cas.usf.edu/mbrannick/regression/Partial.htmlThe formula to compute the partial r from correlations is In our example, (1 = GPA, 2 = CLEP, 3 = SAT) You won't be using this equation to figure partials very often, but it's important for two reasons: (1) the partial correlation can be (a little or a lot) larger or smaller then the simple correlation, depending on the signs and size of the correlations used, and (2) for its relation to …