[QUOTE=science_man_88;250104]this is the final thing I come up with if it's not that I have no idea because I obviously don't know the question.[/QUOTE]

Barack Obama is the current President of the United States.

{Barack Obama} is a one-element set which contains Barack Obama.

[TEX]\empty[/TEX] is a zero-element set. It contains no elements.

How would you write the one-element set which contains [TEX]\empty[/TEX]?

[QUOTE=Mr. P-1;250109]Barack Obama is the current President of the United States.

{Barack Obama} is a one-element set which contains Barack Obama.

[TEX]\empty[/TEX] is a zero-element set. It contains no elements.

How would you write the one-element set which contains [TEX]\empty[/TEX]?[/QUOTE]

according to you I can't so i won't

[QUOTE=science_man_88;250122]according to you I can't so i won't[/QUOTE]

{[TEX]\empty[/TEX]}

[QUOTE=axn;250123]{[TEX]\empty[/TEX]}[/QUOTE]

Or even {{}}, if you like.

[QUOTE=axn;250123]{[TEX]\empty[/TEX]}[/QUOTE]

I tried to make that but I didn't realize how.

[QUOTE=science_man_88;250135]I tried to make that but I didn't realize how.[/QUOTE]

What was the problem?

[QUOTE=Mr. P-1;250153]What was the problem?[/QUOTE]


That I kept the braces inside a [tex] instead of outside like axn did and so they never rendered as text ( yes I tried the \text it didn't work) .

You should have described it in words, then!

In TeX you can add braces with the commands \{ and \}.

[QUOTE=CRGreathouse;250163]You should have described it in words, then!

In TeX you can add braces with the commands \{ and \}.[/QUOTE]

Every time I to explain something in my words it's always either wrong or misunderstood, for the most part.

[QUOTE=science_man_88;250166]Every time I to explain something in my words it's always either wrong or misunderstood, for the most part.[/QUOTE]

Practice makes perfect.

PS:- Punctuations, capitalization, grammar and other niceties help!

[QUOTE=science_man_88;250166]Every time I to explain something in my words it's always either wrong or misunderstood, for the most part.[/QUOTE]

No, not always. We're over that problem now.