Well i guess for symmetric complex matrices the word "positiv definite" is senseless in general, for hermitian matrices there is a intepretation, we defined a matrix to be positiv definite if 
$$\langle x, A x \rangle&gt; 0$$ 
for $x\neq 0$, but this definition makes no sense when you expect complex numbers, as there is no order in the complex numbers. 

What do you mean with the nature of some points? Maybe you don't need to do that.

How to determine if a matrix is positive/negative definite, having complex eigenvalues?
I have a code base of native C++. Recently I incorporated a Windows 8 tablet into the system that we deploy to. 

I have a .NET managed DLL that accesses the Tablet orientation sensor. This managed code is wrapped by an unmanaged class that I can access from the native C++.

The problem is that I cannot run and debug the code on my Windows 7/VS2010 box without getting an Access Violation at the outset. No breakpoints are even hit before the exception.

Is there a way to ignore the managed DLL while debugging on the Windows 7/VS2010 box? 
