give a poset that has:
a) a minimal element but no maximal element
b) a maximal element but no minimal element
c) neither a maximal nor a minimal element
NOTE! can someone at least explain for me what is a poset??? what is this all about ????
Thank you a lot
be pretty sure of that If I knew mathematics like you do, I wouldn't be here asking questions. I don't think "ask a question" is something that I should be ashamed of, since this place is created for that reason.
you are here to help people with your abilities in mathematics or you are here to tease people for what they do not know and they try to learn???
If you see that I don't know the basic definitions and I need them to understand my question, then explain and inspire a user to go and learn more, instead of teasing him/her for not knowing a concept...