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mathteacher1729Best ResponseYou've already chosen the best response.1
Hi @sasogeek , in every context I've ever seen, null set and empty set mean the same thing. A set with no elements.
 one year ago

sasogeekBest ResponseYou've already chosen the best response.0
well we had an exam and the teacher asked which of the following options was a null set. a. b.{} c.{0} d.\(\phi \)
 one year ago

mathteacher1729Best ResponseYou've already chosen the best response.1
Heh. If I were grading this, I'd accept b or d. Perhaps your professor has a preferred notation? Here is the definition from Wolfram Mathworld: http://mathworld.wolfram.com/NullSet.html
 one year ago

sasogeekBest ResponseYou've already chosen the best response.0
so i guess i'm wrong...? since \(\phi \) denotes {} ?
 one year ago

mathteacher1729Best ResponseYou've already chosen the best response.1
To me, this is splitting hairs. I'd ask your professor if s/he has a preferred notation and go with that for future reference.
 one year ago

sasogeekBest ResponseYou've already chosen the best response.0
i asked him during the test and he said it was meant to confuse us but he'll tell us the answer next class so i look forward to questioning him tomorrow since tomorrow is the next lecture :)
 one year ago

mathteacher1729Best ResponseYou've already chosen the best response.1
Strange. Well, to each their own. For me, I try to make definitions and notation as clear as possible from day 1. ;p But that's me.
 one year ago

sasogeekBest ResponseYou've already chosen the best response.0
hmmm oh well. i guess i'd never know which answer he's in search of unless he utters it himself. thanks for the help though :) that link helped a bit. and i appreciate your input x
 one year ago
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