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39 lines
861 B
ReStructuredText
39 lines
861 B
ReStructuredText
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.. _greenfunctions:
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The Green function class
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========================
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The TRIQS library has a class called ``gf`` which allows you to manipulate easily a whole set of Green functions.
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You can use as variable(s)
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* real time(s),
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* real frequency(ies),
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* Matsubara time(s),
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* Matsubara frequency(ies),
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* or other variables that you can define.
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More generally, the variable is a point of a ``domain``
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The value of the Green function can be a scalar, a matrix or whatever you want (this type is called type ``target_t``).
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You can group several green functions into *blocks* (for example, one block per orbital, or per wave vector...).
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Fourier transforms are implemented for these Green functions:
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real time <-> real frequency
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Matsubara time <-> Matsubara frequency
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.. toctree::
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:maxdepth: 2
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concepts
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fourier
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cookbook/contents
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