For those wondering, man, which uses less as a pager, has vi-like key bindings.
"/<\(" starts a regex-based search for "<(" (you must escape the open paren).
This is the origin of the regex literal syntax in most programming languages that have them. It was first introduced by Ken Thompson in the "ed" text editor.
If you're interested in stock Posix shell rather than bashish, the dash man page is a whole lot shorter and easier to follow, makes a great concise reference.