Matemaatissa
Matemaatissa is a term that appears in some contexts, but it does not correspond to a recognized field of study, a specific mathematical concept, or a universally accepted mathematical object. Its usage is not standard within the academic or professional mathematical community.
It is possible that "matemaatissa" is a misspelling of a related term, such as "matemaattinen" (mathematical
If "matemaatissa" was encountered in a specific text or discussion, examining that source for additional clues