Question: How can I insert mathematical notaions in Labels when plotting figures ?

Dear all,

     How can I insert mathematical notaions in Labels when plotting figures ?  I never encounter this problem, but now it is urgent for me to resolve it.  In labels, I depict the meaning of axes and need to use some mathematical notatioons.   If  someone  knows how to realize it , please inform me ASAP. Thank you very much ! 

Kindly regards,

Yours

huang 

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