Heyting or Heating: How To spell?
The word Heyting is misspelled against Heating, an adjective meaning "That heats or imparts heat; promoting warmth or heat; exciting action; stimulating; as, heating medicines or applications."
Heating has vowels 'ea' together mispronounced as 'ey'Word contains consecutive vowels 'EA' in between alphabets h & ting is misspelled as 'EY'
Wrong Spelling:  h-ey-ting  Correct Spelling:  h-ea-ting 
Find more wrongly spelled words of Heating to spell it well.