DOUBLE STROKE NOT SIGN is one of the 256 characters in the Supplemental Mathematical Operators Unicode subset.
The image below shows how the DOUBLE STROKE NOT SIGN symbol looks like in some of the most complete UTF-8 fonts: Code2000, Sun-ExtA, WenQuanYi Zen Hei and GNU Unifont. If the font in which this web site is displayed does not contain the DOUBLE STROKE NOT SIGN symbol, you can use the image below to get an idea of what it should look like.
Please share your opinion about this UTF-8 symbol. If you have any useful insight information you would like to share (such as historical, emotional, literal meaning, or any other use cases) please leave a comment below and let us know. We would honestly appreciate it.