Unicode char \u8:√ and \u8:∛ not set up for use with LaTeX (TeX Live 2013)

[rickhg12hs]

make -C doc latexpdf encounters errors

This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013) (format=pdflatex 2
014.4.9)  3 JUN 2014 02:12
...
! Package inputenc Error: Unicode char \u8:√ not set up for use with LaTeX.

See the inputenc package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.21017 The prefix operator \code{√} is equivalent to \code{sqrt}.
? 

! Package inputenc Error: Unicode char \u8:∛ not set up for use with LaTeX.

See the inputenc package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.21033 .../3}\).   The prefix operator \code{∛}  is equivalent to \code{cb...

? 

[jiahao]

We'll have to keep adding such piecemeal hacks for pdflatex compilation to work. It's too bad sphinx has no official support for texes like xetex or luatex that have full Unicode support.