[tex4ht] Blackboard bold

Hans Georg Schaathun georg+tex at schaathun.net
Mon Aug 24 13:42:24 CEST 2015

Dear all,

Does anyone know of a good way to get blackboard bold in MathML
output from TeX4ml?  All I need are the N/Z/Q/R/C for natural
numbers, integers, and rational, real and complex numbers.

I found a list of suitable MathML tags at
so I am certain it can be done.  Since I am worried that I will
mess up the MathML if I try to jury rig my macros, it would be nice 
if someone has found an out-of-the-box solution.

:-- Hans Georg

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