All type combinations <C-X>for "Ctrl + X", you need:
:imap < <
:imap > >
Alternatively, you may also consider using :ab:
:iab < <
:iab > >
Then you enter < SPACEand you will receive <. This allows you to enter:
<a href
and get:
<a href
or enter:
X < Y
and get:
X < Y
, , :
:help :imap
:help :abbreviations