- #1
DorumonSg
- 64
- 0
Do all sets include Empty set by default?
Like I have { {a}, {b}, {c} }, its equal to { emptySet, {a}, {b}, {c} }?
See I have this question it goes something like.
The power set of {a, b} is {emptySet, {a}, {b}, {a,b}}
So for all A, B that belongs to the power set {a,b}, A R B where A is a subset of B
Which means
I get
{a} -> {a}
{b} -> {b}
{a} -> {a, b}
{b} -> {a, b}
{a, b} -> {a, b}
emptySet -> emptySet
So I know that this relation has no greatest element.
But my answer also states this relation least element is the emptySet? Why is this so? is does not relate to anyone other than itself, unless all sets contains emptySet by default? Or am I doing something wrong here?
Like I have { {a}, {b}, {c} }, its equal to { emptySet, {a}, {b}, {c} }?
See I have this question it goes something like.
The power set of {a, b} is {emptySet, {a}, {b}, {a,b}}
So for all A, B that belongs to the power set {a,b}, A R B where A is a subset of B
Which means
I get
{a} -> {a}
{b} -> {b}
{a} -> {a, b}
{b} -> {a, b}
{a, b} -> {a, b}
emptySet -> emptySet
So I know that this relation has no greatest element.
But my answer also states this relation least element is the emptySet? Why is this so? is does not relate to anyone other than itself, unless all sets contains emptySet by default? Or am I doing something wrong here?