mjo-algebra.tex,examples.tex: add the \variety command

[mjotex.git] / mjo-algebra.tex

diff --git a/mjo-algebra.tex b/mjo-algebra.tex
index 1ab88806c2cdad1caa64bfb62ea860496e820db9..42ab2aa053f40879b4b3f5df20267ee54385b833 100644 (file)
--- a/mjo-algebra.tex
+++ b/mjo-algebra.tex
@@ -94,4 +94,17 @@
 % given by its second argument.
 \newcommand*{\Stab}[2]{ #1_{#2} }
 
+
+% The affine algebraic variety consisting of the common solutions to
+% every polynomial in its argument, which should be a subset of some
+% polynomial ring.
+\newcommand*{\variety}[1]{ \mathcal{V}\of{{#1}} }
+\ifdefined\newglossaryentry
+  \newglossaryentry{variety}{
+    name={\ensuremath{\variety{I}}},
+    description={variety corresponding to the ideal $I$},
+    sort=p
+  }
+\fi
+
 \fi