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mathteacher1729
 2 years ago
Best ResponseYou've already chosen the best response.1Hi @sasogeek , in every context I've ever seen, null set and empty set mean the same thing. A set with no elements.

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

mathteacher1729
 2 years ago
Best ResponseYou've already chosen the best response.1Heh. 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

sasogeek
 2 years ago
Best ResponseYou've already chosen the best response.0so i guess i'm wrong...? since \(\phi \) denotes {} ?

mathteacher1729
 2 years ago
Best ResponseYou've already chosen the best response.1To me, this is splitting hairs. I'd ask your professor if s/he has a preferred notation and go with that for future reference.

sasogeek
 2 years ago
Best ResponseYou've already chosen the best response.0i 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 :)

mathteacher1729
 2 years ago
Best ResponseYou've already chosen the best response.1Strange. 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.

sasogeek
 2 years ago
Best ResponseYou've already chosen the best response.0hmmm 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
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