Atheism is the lack of belief in a god. In another article I wrote here on Medium introducing the term niltheism, which means belief in zero gods. Sure, the two terms are synonyms. But, I like niltheism as it becomes a belief, so it could compete with any of the theisms (monotheism, monolatrism, or polytheism).

Anyway, God doesn't exist. You advise me to search for the ultimate and infinite truth, and I will find God. No, I have studied mathematics. We run into infinity a lot in there, and infinity is infinity, not God.