Contents of Volume 48 / Inhalt von Jahrgang 48 Sommaire du volume 48 / Indice delhanno 48

Volume 48, September 2006

Analog Dialogue Volume 48 Number 2

In This Issue 2 Editor’s Notes; New Product Introductions 3 An Introduction to MEMS Vibration Monitoring 6 Complex Power-Supply Sequencing Made Easy 9 Creative Compensation Enables Tiny Amplifier to Drive 200-mW Loads 13 Simple Circuit Allows Backward Compatibility for Digital Power Controllers 16 Capacitance-to-Digital Converter Facilitates Level Sensing in Diagnostic Systems 19 Current-Output...

Asymptotic Group Theory, Volume 48, Number 4

W hat is the probability that two randomly chosen permutations of 1, . . . , n generate the group Sn of all permutations of 1, . . . , n ? How many subgroups of index n can a group with two generators have? What can be said about a group of order 2n which has a nonidentity commutator of length n− 10? These questions all concern different aspects of a field which is very active nowadays and whic...

/ 48

i n t e r a c t i o n s / j a n u a r y + f e b r u a r y 2 0 0 4

Honeycombs and Sums of Hermitian Matrices, Volume 48, Number 2

I n 1912 Hermann Weyl [W] posed the following problem: given the eigenvalues of two n× n Hermitian matrices A and B, how does one determine all the possible sets of eigenvalues of the sum A + B? When n = 1, the eigenvalue of A + B is of course just the sum of the eigenvalue of A and the eigenvalue of B, but the answer is more complicated in higher dimensions. Weyl’s partial answers to this prob...