-% The space of real symmetric n-by-n matrices. Does not reduce to
-% merely "S" when n=1 since S^{n} does not mean an n-fold cartesian
-% product of S^{1}.
-\newcommand*{\Sn}[1][n]{ \mathcal{S}^{#1} }
-\ifdefined\newglossaryentry
- \newglossaryentry{Sn}{
- name={\ensuremath{\Sn}},
- description={the set of $n$-by-$n$ real symmetric matrices},
- sort=Sn
- }
-\fi
-
-% The space of complex Hermitian n-by-n matrices. Does not reduce to
-% merely "H" when n=1 since H^{n} does not mean an n-fold cartesian
-% product of H^{1}.
-\newcommand*{\Hn}[1][n]{ \mathcal{H}^{#1} }
-\ifdefined\newglossaryentry
- \newglossaryentry{Hn}{
- name={\ensuremath{\Hn}},
- description={the set of $n$-by-$n$ complex Hermitian matrices},
- sort=Hn
- }
-\fi
-
-
-%
-% Basic set operations
-%
-
-% The union of its two arguments.
-\newcommand*{\union}[2]{ {#1}\cup{#2} }
-
-% A three-argument union.
-\newcommand*{\unionthree}[3]{ \union{\union{#1}{#2}}{#3} }
-
-% The intersection of its two arguments.
-\newcommand*{\intersect}[2]{ {#1}\cap{#2} }
-
-% A three-argument intersection.
-\newcommand*{\intersectthree}[3]{ \intersect{\intersect{#1}{#2}}{#3} }
-