VecDotRealPart

Computes the real part of the vector dot product.

Synopsis

#include "petscvec.h"   
PetscErrorCode VecDotRealPart(Vec x, Vec y, PetscReal *val)

Collective

Input Parameters

• x - first vector

• y - second vector

Output Parameter

• val - the real part of the dot product;

Notes for Users of Complex Numbers

See VecDot() for more details on the definition of the dot product for complex numbers

For real numbers this returns the same value as VecDot()

For complex numbers in C^n (that is a vector of n components with a complex number for each component) this is equal to the usual real dot product on the the space R^{2n} (that is a vector of 2n components with the real or imaginary part of the complex numbers for components)

Developer Notes

This is not currently optimized to compute only the real part of the dot product.

See Also

Vectors and Parallel Data, Vec, VecMDot(), VecTDot(), VecNorm(), VecDotBegin(), VecDotEnd(), VecDot(), VecDotNorm2()

Level

intermediate

Location

src/vec/vec/interface/rvector.c

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Index of all Vec routines
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Index of all manual pages