PowerShell comes with lots of white papers. However, you do not need to know the exact title of the white paper to find information about a specific topic. Simply use Get-Help and enter a keyword that is contained in the white paper title.
You should try this if you'd like to find out more about special characters:
You should use this to get more information about comparison operators:
However, if your keyword is not specific enough, the command will list the names of all white papers. Instead, you should pick one from the list and specify its exact title.