doc/source/tutorial/_LaTeXMathMacros.rst
.. This following environment provides LaTeX macros for math environments.
To use these macros add the following line to the applicable .rst file:
.. include:: MathMacros.rst
The macros are defined after this line to the end of the file.
Currently, this file is only included by the file fft.rst.
.. math::
\newcommand{\IC}{{\mathbb{C}}} % set of complex numbers
\newcommand{\IN}{{\mathbb{N}}} % set of natural numbers
\newcommand{\IR}{{\mathbb{R}}} % set of real numbers
\newcommand{\IZ}{{\mathbb{Z}}} % set of integers
\newcommand{\jj}{{\mathbb{j}}} % imaginary unit
\newcommand{\e}{\operatorname{e}} % Euler's number
\newcommand{\dd}{\operatorname{d}} % infinitesimal operator
\newcommand{\abs}[1]{\left|#1\right|} % absolute value
\newcommand{\conj}[1]{\overline{#1}} % complex conjugate
\newcommand{\conjT}[1]{\overline{#1^T}} % transposed complex conjugate
\newcommand{\inv}[1]{\left(#1\right)^{\!-1}} % inverse
\newcommand{\rect}{\operatorname{rect}} % rect or boxcar function
\newcommand{\sinc}{\operatorname{sinc}} % sinc(t) := sin(pi*t) / (pi*t)
% overwrite macros:
\renewcommand{\Re}{\operatorname{Re}} % real part of a complex number
\renewcommand{\Im}{\operatorname{Im}} % imaginary part of a complex number
% Since the physics package is not loaded, we define the macros ourselves:
\newcommand{\vb}[1]{\mathbf{#1}} % vectors are bold
\newcommand{\mat}[1]{\mathrm{#1}} % matrices are upright
%
% Abbreviations of matrices and vectors :
\newcommand{\mF}{\mat{F}} % matrix with DFT coefficients
\newcommand{\mI}{\mat{I}} % unity matrix