Positive correlation for increasing events with disjoint dependencies does not imply positive correlation for all increasing events

Correlation functions for symmetrized increasing subsequences

We show that the correlation functions associated to symmetrized increasing subsequence problems can be expressed as pfaffians of certain antisymmetric matrix kernels, thus generalizing the result of [11] for the unsymmetrized case. Introduction In [11], Okounkov derived the following symmetric function identity: For any finite subset S ⊂ Z,

Positive Correlation of Resistin with Blood Lipids in Gestational Diabetes

Background &Objective: Resistin is an important adipokin, secreted from adipocytes and causes insulin resistance. Gestational diabetes (GDM) is characterized by insulin resistance in insulin target tissues. The goal of this research was to investigate whether there is a relationship among resistin and various clinical and metabolic parameters in GDM.Materials & Methods: 76 pregnant women who go...

Does non-correlation imply non-causation?

The Markov condition describes the conditional independence relations present in a causal model that are consequent to its graphical structure, whereas the faithfulness assumption presumes that there are no other independencies in the model. Cartwright argues that causal inference methods have limited applicability because the Markov condition cannot always be applied to domains, and gives an e...

Composite Events for Network Event Correlation

With the increasing complexity of enterprise networks and the Internet, event correlation is playing an increasingly important role in network as well as integrated system management systems. Even though the timing of events often reveals important diagnostic information about event relationships and should therefore be represented in event correlation rules or models, most extant approaches la...

Increasing Understanding: Interpreting Events of Change