Lema or Lemma: How To spell?
The word Lema is misspelled against Lemma, a noun meaning "A preliminary or auxiliary proposition demonstrated or accepted for immediate use in the demonstration of some other proposition, as in mathematics or logic."
Lemma has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings le & a which should not be misspelled with single 'M'
Wrong Spelling:  le-m-a  Correct Spelling:  le-mm-a 
Explore spell check of Lemma to spell without errors.