Symbols:Fonts/mathbb/Lowercase

Font Description
The lowercase letters of the alphabet rendered in the mathbb font are:
 * $\mathbb {a \ b \ c \ d \ e \ f \ g \ h \ i \ j \ k \ l \ m \ n \ o \ p \ q \ r \ s \ t \ u \ v \ w \ x \ y \ z}$

Hence there is only one lowercase letter implemented in mathbb:
 * $\mathbb k$

the rest implemented as mathrm.