Siegel’s axiom

In a mathematical text two mathematical symbols that do not form a larger of have to be by at least one word or by a punctuation mark.
Example: Do not write “… take $n$ $n\times n$-matrices”, but rather “take $n$ matrices of order $n\times n$”.

Title	Siegel’s axiom
Canonical name	SiegelsAxiom
Date of creation	2013-03-22 14:11:59
Last modified on	2013-03-22 14:11:59
Owner	mathwizard (128)
Last modified by	mathwizard (128)
Numerical id	8
Author	mathwizard (128)
Entry type	Axiom
Classification	msc 00A99