What ㅋ or ﾻ means?
I know this is stupid question... and sorry for asking this...
actually, someone asked me "I know what E 'reversed'. but what is 'reversed F' mean?"
Since I knew he is majoring math, I thought E is some kind of function or vector field, and have to reverse by axis or something.
but he just repeated "what is 'reversed F' mean? I don't even know whether it exists"
and I was confused. maybe he is dealing with some kind of existence problem. So I told him that it's confusing, and I think I need more information about the problem. then he just insulted me and left.
several minutes after, he came to me again and informed me that ﾻ is some kind of symbol, and left after cursing me. and realized 'reversed E' means 'there exist' sign ∃
So I had to know what 'ﾻ' means. I asked my friends majoring math and algebra professor. but I got no information. so this question is my last try.
Sorry to post this kind of question. I know this is not a proper question to this site. But i really want to know what that symbol is.
thank you.
