06.06.2013 Views

Theory of Statistics - George Mason University

Theory of Statistics - George Mason University

Theory of Statistics - George Mason University

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

862 Appendix C. Notation and Definitions<br />

Norms and Inner Products<br />

Lp<br />

For real p ≥ 1, a norm formed by accumulating the p th<br />

powers <strong>of</strong> the moduli <strong>of</strong> individual elements in an object<br />

and then taking the (1/p) th power <strong>of</strong> the result.<br />

· In general, the norm <strong>of</strong> the object ·.<br />

· p<br />

xp<br />

Xp<br />

XF<br />

In general, the Lp norm <strong>of</strong> the object ·.<br />

For the vector x, the Lp norm<br />

xp =<br />

For the matrix X, the Lp norm<br />

1<br />

p<br />

|xi|<br />

p<br />

.<br />

Xp = max<br />

vp=1 Xvp.<br />

For the matrix X, the Frobenius norm<br />

<br />

<br />

XF = x2 ij .<br />

〈x, y〉 The inner product or dot product <strong>of</strong> x and y.<br />

κp(A) The Lp condition number <strong>of</strong> the nonsingular square matrix<br />

A with respect to inversion.<br />

Notation Relating to Matrix Determinants<br />

|A| The determinant <strong>of</strong> the square matrix A, |A| = det(A).<br />

det(A) The determinant <strong>of</strong> the square matrix A, det(A) = |A|.<br />

|A(i1,...,ik)| A principal minor <strong>of</strong> a square matrix A; in this case, it is<br />

the minor corresponding to the matrix formed from rows<br />

i1, . . ., ik and columns i1, . . ., ik from a given matrix A.<br />

|A−(i)(j)| The minor associated with the (i, j) th element <strong>of</strong> a<br />

square matrix A.<br />

<strong>Theory</strong> <strong>of</strong> <strong>Statistics</strong> c○2000–2013 James E. Gentle<br />

i,j

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!