WARNING:
MathJax
requires JavaScript to process the mathematics on this page.
Please be sure that it is enabled.
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There are other problems.
MathML is
really
designed to work in XHTML pages,
not HTML pages.
(
XHTML
stands for e
X
tensible
H
yper
T
ext
M
arkup
L
anguage.)
(XHTML is much stricter than HTML.)