5,034 reputation
22174
bio website
location
age
visits member for 2 years, 5 months
seen 20 hours ago

Здравствуйте!

I am learning mathematics to help further mathematical development in my country.


May
28
accepted What's so well in having a least element in a set?
May
28
accepted What's the motivation of the ideal?
May
28
comment Texas TI-alternatives
@Anonymous What ones have you tried? What is a good GUI?
May
28
accepted Why is the coefficient of $x$ in $\frac{1}{x}=0$?
May
28
accepted Where to start for studying geometry and what way should I follow after the first step?
May
28
accepted Is $\sqrt{-1}$ positive or negative?
May
28
comment Proving that ${n}\choose{k}$ $=$ ${n}\choose{n-k}$
Nevermind. I got it now.
May
28
asked Proving that ${n}\choose{k}$ $=$ ${n}\choose{n-k}$
May
25
comment Show that $S\cap(T\,\cup \,T') = (S\,\cap\,T)\cup(S\,\cap\,T')$
@PeterLeFanuLumsdaine Yes, Peter. The answer is a great addendum to me. It may help me a lot in the near future.
May
25
comment Show that $S\cap(T\,\cup \,T') = (S\,\cap\,T)\cup(S\,\cap\,T')$
Well, it may help me in the future.
May
25
comment Show that $S\cap(T\,\cup \,T') = (S\,\cap\,T)\cup(S\,\cap\,T')$
Mathematical hipsters perhaps?
May
25
comment Show that $S\cap(T\,\cup \,T') = (S\,\cap\,T)\cup(S\,\cap\,T')$
Oh, got it! Thanks Asaf.
May
25
comment Show that $S\cap(T\,\cup \,T') = (S\,\cap\,T)\cup(S\,\cap\,T')$
Wait. It's an element that is in both $S$ and $(T\,\cup\,T')$. I feel they are the same but I can't explain it.
May
25
comment Show that $S\cap(T\,\cup \,T') = (S\,\cap\,T)\cup(S\,\cap\,T')$
I'm not sure on how to do that. I'm unable to pick elements in that manner (Can you expand a little?) - but I've made a Venn diagram with it - I do undestand that the Venn diagram is the manifestation of such abstraction (?) but I'm still confused.
May
25
asked Show that $S\cap(T\,\cup \,T') = (S\,\cap\,T)\cup(S\,\cap\,T')$
May
24
revised What's so well in having a least element in a set?
edited title
May
24
comment What's so well in having a least element in a set?
Yeah - I'm not really worried with it's name. I was just courious on why this concept was named like this.
May
24
comment What's so well in having a least element in a set?
I know it's just a name. But someone somewhere may have thought: "Hey! This mathematical pattern is well because of X" - I want to know what's the X.
May
24
comment What's so well in having a least element in a set?
I've read only a naive definition of the involved concept.
May
24
asked What's so well in having a least element in a set?