At present I am using LyX-2.3.7 for writing a book for Statistics, wherein I need to use the math symbol equivalent to tex command \nrightarrow. For example, I need to state the negative form of x -> o. In the display screen of LyX the required symbol appears correctly, but during pdf compilation (all forms provided into LyX), does not convert the symbol, and nothing is printed in the pdf.
It rather gives a warning in the log file that this symbol was never defined. When I used the tex command as ERT of \nrightarrow, then also it showed the same error. Can anybody give any idea to resolve this?. Thanks in anticipation. Dr. A.K. Singh Raipur, India
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